Multifunctional Chair

ABSTRACT

A multifunctional chair is disclosed, including: a first frame body unit, the first frame body unit including a head end and a tail end; a first supporting unit configured to support the first frame body unit, the first supporting unit connected with a first connecting position of the first frame body unit and a height of the tail end of the first frame body unit being lower than a height of the first connecting position; a first leaning unit arranged in a position of the first frame body unit close to the first connecting position; a second frame body unit arranged on a back portion of the first frame body unit, the second frame body unit and the first frame body unit being rotatably connected, the second frame body unit and the first frame body unit in rotatable connection being capable of moving between a first posture of a reclining chair or a seat and a second posture of fitness equipment, the second frame body unit and the first frame body unit being in the first posture when having an angle, and the second frame body unit and the first frame body unit being in the second posture when the tail ends of the second frame body unit and the first frame body unit are overlapped; and a second leaning unit arranged on the second frame body unit. The multifunctional chair has multiple functions and is also used for seats, recliners and fitness equipment, and has simple structure, simple and fast operation, convenient use, and easy to carry and transport.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Chinese PatentApplication No. 202011478799.7, filed Dec. 15, 2020, titled “AMultifunctional Chair”, the disclosure of which is hereby incorporatedin its entirety.

TECHNICAL FIELD

The invention relates to the field of furniture, in particular to amultifunctional chair.

BACKGROUND

A recliner is a chair with a long backrest and tilted backwards. Peoplecan lie on it to rest, with the improvement of people's livingstandards, recliners have become popular leisure products in many placessuch as homes, offices, public places, and outdoors. The existingrecliners are mostly composed of a seat and a seat back that is inclinedto the seat. Although it can be used for people to lie down and rest onit to meet people's daily needs, it has a single function and no fitnessfunction.

The Chinese patent is authorized to announce a utility model patent fora folding fitness recliner Announcement Number: CN202858399U), whichincludes a backing board, an armrest, a sitting board, a footrest, afoot board support, an X-shaped chair support and a connecting frame.Among them, the backing board Connected with the seat board, thestepping board and the seat board are movably and telescopicallyconnected. There is a multi-position card slot plate in thecard-position armrest. One end of the card slot plate extends out of thearmrest and is connected to the side of the backing board. There is amovable support under the armrest. The rod is twisted with theconnecting frame, and the upper end of the movable support rod isprovided with clamping nails and the card slot; the rods on the twoupper ends of the chair support are movably connected with the elongatedslots provided on both sides of the connecting frame, and the foot boardsupport and the step board Stranded connection; also includes pulley,presser foot bending rod, tension spring, pulley support rod; the upperend of the pulley support rod is twisted with the middle part of theback of the backing plate, and the lower end is fixedly connected withthe middle point of the coupling shaft of a pair of pulleys; the lowerpart of the back of the backing plate is provided The tension spring isconnected with the lower end of the pulley support rod; the two ends ofthe bending rod of the presser foot are movably connected with the twoouter ends of the footboard.

The patent adds foldable and fitness functions to the traditionalrecliner chair, which is more effective in use, but still has thefollowing shortcomings: (1) There are many components, the structure iscomplex, and the overall chair is relatively bulky and inconvenient touse, package, and Carrying and transportation; (2) The front and rearheight of the chair seat is the same. When the chair is in the reclinerstate, only the hips fit the seat and the comfort is not high; the seatback and seat cannot be adjusted to the support range required forfitness. When using for fitness, it is inconvenient to use, and evenaffects the stretching of legs, waist, abdomen, back, shoulders, neckand other parts; (3) When switching the recliner to the fitness state,the foot support, X The chair supports are folded one by one, and thebending bar of the presser foot is bent upward. The operation iscomplicated, time-consuming and labor-intensive.

SUMMARY

Aiming at the deficiencies in the prior art, the present inventionprovides a multifunctional chair with multiple functions, which is alsoused for seats, recliners and fitness equipment, and has simplestructure, simple and fast operation, convenient use, and easy to carryand transport.

The specific technical solutions are as follows:

A multifunctional chair, comprising:

a first frame body unit, the first frame body unit being provided with ahead end and a tail end;

a first supporting unit configured to support the first frame body unit,the first supporting unit being connected with a first connectingposition of the first frame body unit and a height of the tail end ofthe first frame body unit being lower than a height of the firstconnecting position;

a first leaning unit arranged in a position of the first frame body unitclose to the first connecting position;

a second frame body unit arranged on a back portion of the first framebody unit, the second frame body unit and the first frame body unitbeing rotatably connected, the second frame body unit and the firstframe body unit in rotatable connection being capable of moving betweena first posture of a reclining chair or a seat and a second posture offitness equipment, the second frame body unit and the first frame bodyunit being in the first posture when having an angle, and the secondframe body unit and the first frame body unit being in the secondposture when the tail ends of the second frame body unit and the firstframe body unit are overlapped; and

a second leaning unit arranged on the second frame body unit.

Further technical solutions, wherein the first frame body unit comprisesa frame body structure I and transverse supporting structures I arrangedin parallel, the transverse supporting structures I are arranged on theframe body structure I at an interval, the frame body structure I andthe transverse supporting structures I are configured to mount andsupport the first leaning unit, the frame body structure I and/or thetransverse supporting structures I are arranged as a rod-shapedstructure, and the frame body structure I is arranged as anupward-convex arc-shaped structure.

Further technical solutions, wherein the frame body structure I isarranged as an integrated structure.

Further technical solutions, wherein the frame body structure I isarranged as a split structure, comprising:

a frame body portion I; and

a frame body portion II pivotably connected with the frame body portionI via a pivotal structure I, the pivotal structure I comprising a framebody portion III and at least two pivotal connectors I hinged to twoends of the frame body portion III, the frame body portion I and theframe body portion II being respectively hinged with the pivotalconnectors I and being respectively folded, and contracted relative totwo ends of the frame body portion III to change an angle formed betweenthe frame body portion I and the frame body portion II, therebyunfolding and folding states of the frame body portion I and the framebody portion II being adjusted.

Further technical solutions, wherein the second frame body unit isconnected with the first frame body unit via a third rotating assembly,and is configured to adjust a first posture and/or a second posture inposition of the second frame body unit relative to the first frame bodyunit and/or lock the second frame body unit in the first posture and/orthe second posture, the third rotating assembly is arranged in a middleposition of the first frame body unit, and the second frame body unit isarranged to be matched with a shape of the tail end of the first framebody unit;

the second posture is formed in such a way that the second frame bodyunit moves along the direction of the tail end of the first frame bodyunit via rotation of the third rotating assembly to be overlapped withthe tail end of the first frame body unit; and

the first posture is formed in such a way that the second frame bodyunit moves along any one direction of the head end or the tail end ofthe first frame body unit via rotation of the third rotating assembly tohave an angle with the first frame body unit.

Further technical solutions, wherein the second frame body unitcomprises a frame body structure II and transverse supporting structuresII arranged in parallel, the transverse supporting structures II arearranged on the frame body structure II at an interval, the frame bodystructure II and the transverse supporting structures II are configuredto mount and support the second leaning unit, the frame body structureII and/or the transverse supporting structures II are arranged as arod-shaped structure, and the frame body structure II is arranged as anupward-convex arc-shaped structure matched with the tail end of theframe body structure I.

Further technical solutions, wherein the third rotating assemblycomprises:

a ratchet wheel with a ratchet wheel arm, the ratchet wheel arm beingconnected with the frame body structure II and/or the transversesupporting structures II;

a rotating arm, one end thereof being hinged with the ratchet wheel viaa ratchet wheel shaft and the other end thereof being connected with theframe body structure I and/or the transverse supporting structures I;

a check pawl hinged with the rotating arm via a check pawl shaft andarranged corresponding to the ratchet wheel for resisting rotation ofthe ratchet wheel;

a return piece sleeved on the ratchet wheel shaft, one end of the returnpiece being provided with an arc-shaped notch structure, the ratchetwheel being provided with an arc-shaped protrusion structurecorresponding to the arc-shaped notch, and the other end of the returnpiece being provided with a lug structure corresponding to the checkpawl to drive the check pawl to leave the ratchet wheel; and

a restoration piece for restoring the check pawl.

Further technical solutions, wherein the third rotating assemblycomprises:

a connector III connected with the frame body structure II; and

a rotating shaft III, one end thereof being connected with the framebody structure I and the other end thereof being connected with theconnector III.

Further technical solutions, further comprising a third supporting unitfor supporting the second frame body unit, the third supporting unitbeing arranged on a lower rear side of the second frame body unit, thethird supporting unit comprising:

a third supporting piece, an upper end of the third supporting piecebeing rotatably connected with the frame body structure II, the thirdsupporting piece comprising two supporting pieces III and a clampingpiece III, and the upper ends of the two supporting pieces III beingrotatably connected with the two frame body structures II via hingingpieces III respectively and the lower ends thereof being connected topositions of the clamping piece III close to two end portions,respectively; and

At least two third adjusting assemblies, the third adjusting assembliesbeing correspondingly arranged on the two frame body structures I toadjust the position of the third supporting piece relative to the firstframe body unit, each of the third adjusting assemblies comprising anadjusting piece III, the adjusting piece III being provided with severaladjusting channels III, each of the adjusting channels III beingarranged to be matched with the lower end of the third supporting piece,the adjusting channels III being arranged as trough structures opened inthe upper ends, and the clamping piece III between a position where thetwo supporting pieces III and the clamping piece III are connected andtwo end portions of the clamping piece III is connected with the troughstructure in a clamping manner to support and lock the lower end of thethird supporting piece in a certain adjusting channel III.

Further technical solutions, wherein the first connecting position isarranged close to the head end of the first frame body unit and/or isarranged overlapped with the head end of the first frame body unit,there is at least one first supporting unit, the first supporting unitis arranged at an angle with a mounting end surface, the upper end ofthe first supporting unit is arranged obliquely backwards, the firstsupporting unit comprises at least two first supporting pieces arrangedin parallel, each of the first supporting pieces is arranged as arod-shaped structure or a structure that is narrower on the upperportion and wider on the lower portion, and the upper end of the firstsupporting piece is connected with the first connecting position of thefirst frame body unit and the lower end of the first supporting pieceleans against the mounting end surface of a mounting medium.

Further technical solutions, wherein the first supporting piece isarranged as an integrated structure, and the first supporting unit isrotatably connected with the first frame body unit via a first rotatingassembly, the first rotating assembly comprising:

a connector I connected with the first connecting position on the framebody structure I;

a rotating shaft I, one end thereof being hinged with the firstsupporting piece while the other end thereof being connected with theconnector I, the rotating shaft I being arranged perpendicular to adirection of the frame body structure I; and

a limiting piece I arranged on a front portion of the connector I, thefirst supporting unit being rotated forwards relative to the first framebody unit to the front end of the first supporting piece to lean againstthe limiting piece I so as to unfold the first supporting unit, and thefirst supporting unit being rotated by the first frame body unit to leanagainst the first frame body unit so as to fold and contract the firstsupporting unit.

Further technical solutions, wherein the first supporting piece isarranged as a split structure, comprising:

a first supporting portion, a lower end of the first supporting portionbeing arranged close to the first connecting position; and

a second supporting portion pivotably connected with the firstsupporting portion, change an angle between the first supporting portionand second supporting portion, thereby the unfolding and folding statesof the first supporting portion and the second support being adjusted,the second supporting portion being capable of folding and contractingthe second supporting portion when rotating relative to the firstsupporting portion to lean against the lower side of the frame bodyportion I, the second supporting portion being capable of unfolding thesecond supporting portion when rotating relative to the secondsupporting portion to an original state, connecting ends of the firstsupporting portion and the second supporting portion being furtherprovided with positioning protrusions, and the connecting end of thesecond supporting portion being correspondingly provided with apositioning groove to position the unfolded second supporting portion.

Further technical solutions, further comprising a positioning unitarranged on the first supporting unit, wherein when the multifunctionalchair is in the second posture, the positioning unit is configured forplacing and/or positioning a foot or a leg of a human body, thepositioning unit comprising:

at least two positioning connectors arranged at an interval, thepositioning connectors being arranged as rod-shaped structures at aninterval, two ends of the positioning connectors being respectivelyconnected with a first supporting piece; and/or

positioning adjusting pieces sleeved on the positioning connectors, theouter ends of the each of the positioning adjusting pieces being formedwith a positioning end surface for the foot or the leg of the human bodyto lean against and the positioning adjusting piece being arranged as aflexible structure.

Further technical solutions, further comprising a second supportingunit, wherein the second supporting unit is connected with the tail endof the first frame body unit and/or is connected with a main body closeto the tail end.

Further technical solutions, further comprising a second supportingunit, wherein the second supporting unit is composed of the tail end ofthe first frame body unit and/or a main body of the first frame bodyunit close to the tail end.

Further technical solutions, wherein there is at least one secondsupporting unit, the second supporting unit is arranged at an angle withthe mounting end surface, the upper end of the second supporting unit isarranged obliquely forwards, the second supporting unit comprises atleast two second supporting pieces arranged in parallel, each of thesecond supporting pieces is arranged as a rod-shaped structure or astructure that is narrower on the upper portion and wider on the lowerportion, the upper end of the first supporting piece is connected withthe first frame body unit and the lower end of the first supportingpiece leans against the mounting end surface of a mounting medium, thetwo second supporting pieces are respectively located on a same planewith the frame body structure I on the same side, the second supportingunit further comprises at least one second reinforcer arranged betweenthe two second supporting pieces, and the second reinforcer is arrangedas a rod-shaped structure to reinforce the second supporting unit.

Further technical solutions, further comprising a handrail structure,wherein the handrail structure is arranged at the head end of the firstframe body unit, and is sleeved outside the head end of the first framebody unit for holding.

Further technical solutions, wherein the first leaning unit comprises afirst leaning structure for the human body to sit or lie down, the firstleaning structure being formed by extending from a position close to thefirst connecting position and/or from the first connecting positionalong the direction of the tail end of the first frame body unit; and

the second leaning unit comprises a second leaning structure for thehuman body to sit or lie down, the second leaning structure beingarranged on the second frame body unit and being formed by extendingfrom one end of the second frame body unit along the direction of theother end along the first frame body unit.

Further technical solutions, wherein the first leaning structure isconnected with the frame body structure I by an end portion thereofand/or by wrapping the frame body structure I fully;

and/or the second leaning structure is connected with the frame bodystructure II by an end portion thereof and/or by wrapping the frame bodystructure II fully;

the first leaning structure and/or the second leaning structure arearranged as cloth structures and/or leather structures and/or bamboostructures and/or rattan structures and/or plastic structures and/orwooden structures.

Further technical solutions, wherein the first leaning structure isconnected with the frame body structure I via a first connectingassembly, the first connecting assembly being arranged as a bucklingstructure and/or a hooking structure and/or a pasting structure;

and/or the second leaning structure is connected with the frame bodystructure II via a second connecting assembly, the second connectingassembly being arranged as a buckling structure and/or a hookingstructure and/or a pasting structure;

the first leaning structure and/or the second leaning structure arearranged as cloth structures and/or leather structures and/or bamboostructures and/or rattan structures and/or plastic structures and/orwooden structures.

Through the above technical solutions, the present invention achievesthe following beneficial effects:

(1) Multifunctional chair of the present invention, two using posturesof the first posture as the inclining chair or the seat and the secondposture as the fitness equipment can be obtained by adjusting an angularrelation between the second frame body unit and the first frame bodyunit, and the chair is multipurpose. In particular, when the chair isadjusted to the second posture as the fitness equipment, it has thefunctions of fitness equipment, such as sit-up and push-up. In addition,the angle of the second frame body unit relative to the first frame bodyunit can be adjusted arbitrarily as needed, and the demands on fitnessor inclining chair or seat can be satisfied by a switching at any time,making it convenient to operate;

(2) Multifunctional chair of the present invention, a supporting frameis composed of the first frame body unit and the second frame body unit,the first frame body unit and the second frame body unit are providedwith the first leaning unit and the second leaning unit, the secondframe body unit is rotated relative to the first frame body unit, andthe angle between the first leaning unit and the second leaning unit isadjusted therewith conveniently, so that fitness or inclining chair orseat is switched by one key. Further, the structure of themultifunctional chair is simplified greatly, and it is simple andconvenient to mount the chair and convenient to mount or detach thechair;

(3) Multifunctional chair of the present invention, the first frame bodyunit and the second frame body unit can be adjusted to an overlappedstate. On the one hand, the integral structure of the multifunctionalchair can be reduced, so that it is convenient to package, carry andtransport the chair, on the other hand, when the first frame body unitand the second frame body unit serve as the fitness equipment forsit-up, push-up and the like when being adjusted to the overlappedstate, it has a relatively great stretching range for parts such as aleg, a waist, an abdomen, a back, a shoulder and a neck, and the secondframe body unit does not hinder the stretching action and variousstretching actions can be performed freely, and the first supportingunit and the second supporting unit can be folded relative to the firstframe body, so as to further reduce the overall structure of themultifunctional chair, so that it is convenient to package, carry andtransport the chair, and the cost is lowered greatly;

(4) Multifunctional chair of the present invention, as the firstsupporting unit is connected with the first connecting position of thefirst frame body unit, the height of the tail end of the first framebody unit is lower than the height thereof in the first connectingposition, so that when the multifunctional chair is in the first postureof the inclining chair or the seat, the parts such as hip and leg can beattached to the first leaning unit on the first frame body unit, andthus, the contact area between a human body and the first leaning unitis increased, and the stress points are scattered; and therefore, a useris more comfortable and relaxed; and when the multifunctional chair isin the second posture of the fitness equipment, the second frame bodyunit is overlapped on the rear portion of the first frame body unit, sothat the second leaning unit, the first leaning unit and the firstsupporting unit jointly form a supporting range needed by fitness, i.e.,it improves the stretching range to the parts such as leg, waist,abdomen, back, shoulder and neck when it is used for fitness demandssuch as push-up and sit-up, so that existing independent fitnessequipment is completely replaced.

The additional aspects and advantages of the present invention will bepartially given in the following description, and some will becomeobvious from the following description, or be understood through thepractice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described are used to provide a further understanding ofthe present invention and constitute a part of this application. Theexemplary embodiments of the present invention and their descriptionsare used to explain the present invention, and do not constitute animproper limitation of the present invention. In the attached picture:

FIG. 1 is a schematic diagram of the overall structure of themultifunctional chair in the first posture according to the firstembodiment of the present invention.

FIG. 2 is an exploded schematic diagram of FIG. 1.

FIG. 3 is a partial structural diagram of the multifunctional chair inthe first posture according to the first embodiment of the presentinvention.

FIG. 4 is a schematic diagram of the overall structure of themultifunctional chair in the second posture according to the firstembodiment of the present invention.

FIG. 5 is an exploded schematic diagram of FIG. 4.

FIG. 6 is a partial structural diagram of the multifunctional chair inthe second posture according to the first embodiment of the presentinvention.

FIG. 7 is a schematic diagram of the internal structure of the thirdrotating assembly of the multifunctional chair according to the firstembodiment of the present invention.

FIG. 8 is a schematic structural diagram of the first rotating assemblyof the multifunctional chair according to the first embodiment of thepresent invention.

FIG. 9 is a schematic structural diagram of the first leaning unit andpart of the frame body structure I of the multifunctional chairaccording to the first embodiment of the present invention.

FIG. 10 is a schematic structural diagram of the second leaning unit andpart of the frame body structure II of the multifunctional chairaccording to the first embodiment of the present invention.

FIG. 11 is a partial structural diagram of the multifunctional chair inthe first posture according to the second embodiment of the presentinvention.

FIG. 12 is a partial structural diagram of the multifunctional chair inthe second posture according to the second embodiment of the presentinvention.

FIG. 13 is a schematic diagram of an enlarged structure at A in FIG. 11.

FIG. 14 is a partial structural diagram of the multifunctional chair inthe first posture according to the third embodiment of the presentinvention.

FIG. 15 is a partial structural diagram of the multifunctional chair inthe second posture according to the third embodiment of the presentinvention.

FIG. 16 is a schematic structural diagram of the third rotating assemblyof a multifunctional chair according to the third embodiment of thepresent invention.

FIG. 17 is a partial structural diagram of the multifunctional chair inthe first posture according to the fourth embodiment of the presentinvention.

FIG. 18 is a schematic structural diagram of the multifunctional chairin the fourth embodiment of the present invention in the folded andcontracted state.

FIG. 19 is a schematic structural diagram of a pivotal structure I of amultifunctional chair according to the fourth embodiment of the presentinvention.

FIG. 20 is a partial structural diagram of the multifunctional chair inthe first posture according to the fifth embodiment of the presentinvention.

FIG. 21 is a schematic structural diagram of the multifunctional chairin the fifth embodiment of the present invention in the folded andcontracted state.

FIG. 22 is a partial structural diagram of the multifunctional chair inthe six posture according to the fifth embodiment of the presentinvention.

FIG. 23 is a schematic structural diagram of the multifunctional chairin the sixth embodiment of the present invention in the folded andcontracted state.

FIG. 24 is a partial structural diagram of the multifunctional chair inthe seven posture according to the fifth embodiment of the presentinvention.

FIG. 25 is a schematic structural diagram of the second rotatingassembly of a multifunctional chair according to the seventh embodimentof the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Finally, In order to make the objectives, technical solutions, andadvantages of the embodiments of the present invention clearer, thetechnical solutions of the embodiments of the present invention will bedescribed clearly and completely in conjunction with the accompanyingdrawings of the embodiments of the present invention. Obviously, thedescribed embodiments are part of the embodiments of the presentinvention, rather than all of the embodiments. Based on the describedembodiments of the present invention, all other embodiments obtained bya person of ordinary skill in the art without creative work shall fallwithin the protection scope of the present invention.

In the description of the present invention, it should be understoodthat the terms “upper”, “lower”, “front”, “rear”, “left”, “right”,“top”, “bottom”, “inner”, “The orientation or positional relationshipindicated by “outside” is based on the orientation or positionalrelationship shown in the drawings, which is only for the convenience ofdescribing the present invention and simplifying the description, anddoes not indicate or imply that the device or element referred to musthave a specific orientation to The specific azimuth structure andoperation cannot be understood as a limitation of the present invention.

In the present invention, unless otherwise clearly specified andlimited, the terms “installed”, “connected”, “connected”, “fixed” andother terms should be understood in a broad sense, for example, it canbe a fixed connection or a detachable connection. Or integrallyconnected; it can be a mechanical connection or an electricalconnection; it can be directly connected or indirectly connected throughan intermediate medium, and it can be the internal communication betweentwo components. For those of ordinary skill in the art, the specificmeanings of the above-mentioned terms in the present invention can beunderstood according to specific situations.

Unless otherwise defined, the technical terms or scientific terms usedherein shall have the usual meanings understood by those with ordinaryskills in the field to which the present invention belongs. The “first”,“second” and similar words used in the specification and claims of thepatent application of the present invention do not denote any order,quantity or importance, but are only used to distinguish differentcomponents. Similarly, similar words such as “one” or “one” do not meana quantity limit, but mean that there is at least one.

As shown in FIG. 1 to FIG. 10, the embodiment I of the present inventiondiscloses a multifunctional chair, including a first frame body unit 1,a second frame body unit 2, a first supporting unit 3, and a firstleaning unit 13 and a second leaning unit 23 respectively arranged onthe first frame body unit 1 and the second frame body unit 2, where thefirst frame body unit 1 is provided with a head end 101 and a tail end102, the first supporting unit 3 is connected with a first connectingposition 103 of the first frame body unit 1 to support the first framebody unit 1, so that a height of the tail end 102 of the first framebody unit 1 is higher than the first connecting position 103, the firstleaning unit 13 is arranged close to the first connecting position 103and is mainly used to contact and support parts such as a hip and a leg,the second frame body unit 2 is arranged on a rear portion of the firstframe body unit 1 and is rotatably connected with the first frame bodyunit 1, the multifunctional chair can move between a first posture as aninclining chair or a seat and a second posture as fitness equipment dueto the rotatable connection, and the second leaning unit 23 is arrangedon the second frame body unit 2 and is mainly used to contact andsupport parts such as a waist, a back and a shoulder. According to themultifunctional chair of the embodiment, two using postures of the firstposture as the inclining chair or the seat and the second posture as thefitness equipment can be obtained by adjusting an angular relationbetween the second frame body unit 2 and the first frame body unit 1,and the chair is multipurpose. In particular, when the chair is adjustedto the second posture as the fitness equipment, it has the functions offitness equipment, such as sit-up and push-up. In addition, the angle ofthe second frame body unit 2 relative to the first frame body unit 1 canbe adjusted arbitrarily as needed, for example, when it is used as theseat at 90 degrees, as the inclining chair at 135 degrees, as thefitness equipment at 180 degrees and the like, and the demands onfitness or inclining chair or seat can be selected or switched anytime.It is convenient to operate; a supporting frame of the multifunctionalchair in the embodiment is composed of the first frame body unit 1 andthe second frame body unit 2, the first frame body unit 1 and the secondframe body unit 2 are provided with the first leaning unit 13 and thesecond leaning unit 23, the second frame body unit 2 is rotated relativeto the first frame body unit 1, and the angle between the first leaningunit 13 and the second leaning unit 23 is adjusted therewithconveniently, so that fitness or inclining chair or seat is switched byone key. Further, the structure of the multifunctional chair issimplified greatly, and it is simple and convenient to mount the chairand convenient to mount or detach the chair; the first frame body unit 1and the second frame body unit 2 in the embodiment can be adjusted to anoverlapped state. On the one hand, the integral structure of themultifunctional chair can be reduced, so that it is convenient topackage, carry and transport the chair, and the cost is lowered greatly;on the other hand, when the first frame body unit 1 and the second framebody unit 2 serve as the fitness equipment for sit-up, push-up and thelike when being adjusted to the overlapped state, it has a relativelygreat stretching range for parts such as a leg, a waist, an abdomen, aback, a shoulder and a neck, and the second frame body unit 2 does nothinder the stretching action and various stretching actions can beperformed freely; as the first supporting unit 3 is connected with thefirst connecting position 103 of the first frame body unit 1, the heightof the tail end 102 of the first frame body unit 1 is lower than theheight thereof in the first connecting position 103, so that when themultifunctional chair is in the first posture of the inclining chair orthe seat, the parts such as hip and leg can be attached to the firstleaning unit 13 on the first frame body unit 1, and thus, the contactarea between a human body and the first leaning unit 13 is increased,and the stress points are scattered; and therefore, a user is morecomfortable and relaxed; and when the multifunctional chair is in thesecond posture of the fitness equipment, the second frame body unit 2 isoverlapped on the rear portion of the first frame body unit 1, so thatthe second leaning unit 23, the first leaning unit 13 and the firstsupporting unit 3 jointly form a supporting range needed by fitness,i.e., it improves the stretching range to the parts such as leg, waist,abdomen, back, shoulder and neck when it is used for fitness demandssuch as push-up and sit-up, so that existing independent fitnessequipment is completely replaced; certainly, when the second frame bodyunit 2 is overlapped on the rear portion of the first frame body unit 1,the angle between the second leaning unit 23 and the first leaning unit13 can be equal to 180 degrees, i.e., the second frame body unit 2 isjust overlapped ith the rear portion of the first frame body unit 1, andthe angle can be slightly greater than or smaller than 180 degrees,i.e., the second frame body unit 2 inclines slightly and is overlappedto the rear portion of the first frame body unit 1, and it can serve asthe fitness equipment for sit-up and push-up. In addition, in theembodiment, in order for clear description, the first posture for theinclining chair or the seat is that the second frame body unit 2 and thefirst frame body unit 1 have an angle, and the second posture for thefitness equipment is that the second frame body unit 2 is overlappedwith the tail end of the first frame body unit 1. In some otherembodiments, it can further be used as the fitness equipment when thesecond frame body unit 2 and the first frame body unit 1 have the angle,which also falls into the protection scope of the present invention.

As shown in FIG. 3, as an embodiment I of the present invention, thefirst frame body unit 1 includes two frame body structures I 11 arrangedin parallel; the frame body structures I 11 are arranged as rod-shapedstructures; the first leaning unit 13 is mounted and supported betweenthe two frame body structures I 11, so that the two frame bodystructures I 11 and the first leaning unit 13 jointly form a supportingend surface that is primarily used to support the parts such as hip andleg, and therefore, profiles needed by the first frame body unit 1 aresaved greatly, the cost is saved, the overall weight of themultifunctional chair is alleviated, and it is convenient to use andcarry; the two frame body structures I 11 are arranged in parallel, andcompared with a structure that the frame body structures I 11 are notarranged in parallel, on the one hand, the integral size of themultifunctional chair is reduced, so that it is convenient to place,package, carry and transport; and on the other hand, widths of front andback ends of the two frame body structures I 11 are consistent, so thatit is convenient to mount or connect the first leaning unit 13.Certainly, in some other embodiments, there may be one frame bodystructure I 11 that is arranged as a platy structure or a combination ofthree, four, five or even more rod-shaped structures with the firstleaning unit 13 or is not provided with the first leaning unit 13 or isarranged as other frame body structures. The two frame body structures I11 can further be arranged in an unparallel manner such as splay,inverted splay or intersection. The structures, with the first leaningunit 13, can also jointly form the supporting end surface for supportingthe parts such as hip and leg. Certainly, the frame body structure I 11in the embodiment is made of metal materials such as steel and iron, sothat the firmness of the structure is improved. In some otherembodiments, the frame body structure I 11 can be further made ofmaterials such as wood and plastics and other materials or made from acombination of the materials, so that the multifunctional chair is ofmore diversity.

As shown in FIG. 3, as the embodiment I of the present invention, thefirst frame body unit 1 further includes two transverse supportingstructures I 12 arranged between the first frame body structures I 11 atan interval, the transverse supporting structures I 12 are arranged asrod-shaped structures, and the first leaning unit 13 is mounted andsupported above the first frame body structures I 11 and the transversesupporting structures I 12. In the embodiment, by additionally arrangingthe two transverse supporting structures I 12 arranged at an intervalbetween the two frame body structures I 11, the stability and bearingperformance of the first frame body unit 1 and the first leaning unit 13are improved. The two transverse supporting structures I 12 are arrangedat an interval, so that profiles needed by the first frame body unit 1are saved greatly, the cost is saved, the overall weight of themultifunctional chair is alleviated and it is convenient to use andcarry the chair. Certainly, in some other embodiments, there may be onetransverse supporting structure I 12 that is arranged as a platystructure or the transverse supporting structures I may be arranged asthree, four, five or even more rod-shaped structures arranged at aninterval or not at an interval, or the transverse supporting structuresI may be arranged as other frame body structures, so that the stabilityand bearing performance of the first frame body unit 1 can further beimproved. In some other embodiments, the two transverse supportingstructures I 12 may not be arranged. Furthermore, in the embodiment, thetwo transverse supporting structures I 12 are arranged in parallel, sothat a support-free space is formed between the two transversesupporting structures I 12. When the parts such as hip and leg areplaced on the first leaning unit 13 arranged on the first frame bodyunit 1, the user is more comfortable and relaxed. Certainly, in someother embodiments, the two transverse supporting structures I 12 canfurther be arranged in an unparallel manner such as splay and invertedsplay or intersection, so that the stability and bearing performance ofthe first frame body unit 1 can further be improved. In addition, thetransverse supporting structure I 12 in the embodiment is arranged as adownward concave arc-shaped structure, so that the attaching areasbetween the first leaning unit 13 and the parts such as hip and legabove the transverse supporting structure I 12 are further increased,and thus, the comfort levels of the parts such as hip and leg arefurther improved. Certainly, in some other embodiments, the transversesupporting structure I 12 can be further arranged as an upward convexarc-shaped structure to improve the stretching range of the parts suchas leg, waist, abdomen, back, shoulder and neck, or it is arranged as astraight body structure for supporting the parts such as hip and leg,too. Certainly, the transverse supporting structure I 12 in theembodiment is made of metal materials such as steel and iron, so thatthe firmness of the structure is improved. In some other embodiments,the transverse supporting structure I 12 can be further made ofmaterials such as wood and plastics and other materials or made from acombination of the materials, so that the multifunctional chair is ofmore diversity.

As shown in FIG. 3, as an embodiment I of the present invention, theframe body structure I 11 is arranged as an integrated structure, sothat the stability of the frame body structure I 11 is improved, and theframe body structure I is simple in structure and convenient to produceand machine.

As shown in FIG. 3, as an embodiment I of the present invention, thesecond frame body unit 2 is connected with the first frame body unit 1via the third rotating assembly 8, and the third rotating assembly 8 isconfigured to adjust and lock the position of the second frame body unit2 between the first posture for the inclining chair or the seat and thesecond posture for the fitness equipment relative to the first framebody unit 1. In the embodiment, the third rotating assembly 8 isarranged between the second frame body unit 2 and the first frame bodyunit 1, so that the angle and position between the second frame bodyunit 2 and the first frame body unit 1 can be adjusted and locked; thesecond frame body unit 2 is rotated relative to the first frame bodyunit 1, the angle between the first leaning unit 13 and the secondleaning unit 23 is adjusted therewith, so that it is convenient toadjust and fitness equipment or inclining chair or seat is switched byone key. The structure of the multifunctional chair is simplifiedgreatly, the weight of the multifunctional chair is alleviated, and itis convenient to use and carry the multifunctional chair and it isconvenient to mount and detach the multifunctional chair. Certainly, insome other embodiments, the third rotating assembly 8 can further beused to adjust the angle and position between the second frame body unit2 and the first frame body unit 1 and is matched with other lockingstructures to lock the angle and position between the second frame bodyunit 2 and the first frame body unit 1, or the third rotating assembly 8is merely used to lock the angle and position between the second framebody unit 2 and the first frame body unit 1 and is matched with otheradjusting structures to adjust the angle and position between the secondframe body unit 2 and the first frame body unit 1, so that the angle andposition between the second frame body unit 2 and the first frame bodyunit 1 can be adjusted and locked, too.

As shown in FIG. 4, as an embodiment I of the present invention, thesecond posture for the fitness equipment is formed in such a way thatthe second frame body unit 2 moves along the direction of the tail endof the first frame body unit 1 via rotation of the third rotatingassembly 8 to be overlapped with the tail end 102 of the first framebody unit 1, and at the moment, the second leaning unit 23 further movesalong with the second frame body unit 2 to be overlapped with the tailend 102, so that the integral multifunctional chair is in the structureof the fitness equipment for sit-up and push-up, and can be used forlarge-range stretching actions of the parts such as leg, waist, abdomen,back, shoulder and neck. In the embodiment, the third rotating assembly8 is arranged in a middle position of the first frame body unit 1, sothat the second frame body unit 2 can be overlapped with the tail end102 after moving along the direction of the tail end 102 of the firstframe body unit 1, and therefore, it is ensured that the second leaningunit 23 and the first leaning unit 13 are distracted to the maximumrange to form the maximum supporting end surface; certainly, in someother embodiments, the third rotating assembly 8 can be further arrangedin a position that is a distance from the middle position relative tothe first frame body unit 1, so that the second frame body unit 2 isoverlapped with part of structure of the first frame body unit 1 closeto the tail end 102 after moving along the direction of the tail end 102of the first frame body unit 1 so as to form a slightly small supportingend surface, and it can be further switched between the first posturefor the inclining chair or the seat and the second gesture for thefitness equipment. In the embodiment, the second frame body unit 2 isarranged to be matched with the shape of the tail end 102 of the firstframe body unit 1, so that the overlapping degree is higher withoutoccupying extra space. Certainly, in some other embodiments, the shapesof the tail ends 102 of the second frame body unit 2 and the first framebody unit 1 can further be arranged in different shapes, so that the twoare just partially overlapped, and the second posture for the fitnessequipment can be further formed.

As shown in FIG. 1, as an embodiment I of the present invention, thefirst posture for the inclining chair or the seat is formed in such away that the second frame body unit 2 rotates relative to the firstframe body unit 1 via the third rotating assembly 8 and moves along anyone direction of the tail end 102 or the head end 101 of the first framebody unit 1 to have an angle with the first frame body unit 1, and atthe moment, the second leaning unit 23 further moves along with thesecond frame body unit 2 to have an angle with the tail end 102 of thefirst frame body unit 1, so that the integral multifunctional chair isin the structure of the inclining chair or the seat, and the secondframe body unit 2 can be adjusted to a comfortable height as needed.Certainly, when the multifunctional chair is in the first posture forthe inclining chair or the seat, it can further be used for stretchingactions of the parts such as leg, waist, abdomen, back, shoulder andneck.

As shown in FIG. 3, as an embodiment I of the present invention, thesecond frame body unit 2 includes two frame body structures II 21arranged in parallel; the frame body structures II 21 are arranged asrod-shaped structures; the second leaning unit 23 is mounted andsupported between the two frame body structures II 21, so that the twoframe body structures II 21 and the second leaning unit 23 jointly forma supporting end surface that is primarily used to support the partssuch as back and waist, and therefore, profiles needed by the secondframe body unit 2 are saved greatly, the cost is saved, the overallweight of the multifunctional chair is alleviated, and it is convenientto use and carry; the two frame body structures II 21 are arranged inparallel, and compared with a structure that the frame body structuresII are not arranged in parallel, on the one hand, the integral size ofthe multifunctional chair is reduced, so that it is convenient to place,package, carry and transport; and on the other hand, widths of front andback ends of the two frame body structures II 21 are consistent, so thatit is convenient to mount or connect the second leaning unit 23.Certainly, in some other embodiments, there may be one frame bodystructure II 21 that is arranged as a platy structure or a combinationof three, four, five or even more rod-shaped structures with the secondleaning unit 23 or is not provided with the second leaning unit 23 or isarranged as other frame body structures. The two frame body structuresII 21 can further be arranged in an unparallel manner such as splay,inverted splay or intersection. The structures, with the second leaningunit, can also jointly form the supporting end surface for supportingthe parts such as back and waist. Certainly, the frame body structure II21 in the embodiment is made of metal materials such as steel and iron,so that the firmness of the structure is improved. In some otherembodiments, the frame body structure II 21 can be further made ofmaterials such as wood and plastics and other materials or made from acombination of the materials, so that the multifunctional chair is ofmore diversity.

As shown in FIG. 2, as the embodiment I of the present invention, thesecond frame body unit 2 further includes two transverse supportingstructures II 22 arranged between the frame body structures II 21 at aninterval, the transverse supporting structures II 22 are arranged asrod-shaped structures, and the second leaning unit 23 is mounted andsupported in front of the two frame body structures II 21 and thetransverse supporting structures II 22. In the embodiment, byadditionally arranging the two transverse supporting structures II 22arranged at an interval between the two frame body structures II 21, thestability and bearing performance of the second frame body unit 2 andthe second leaning unit 23 are improved. The two transverse supportingstructures II 22 are arranged at an interval, so that profiles needed bythe second frame body unit 2 are saved greatly, the cost is saved, theoverall weight of the multifunctional chair is alleviated and it isconvenient to use and carry the chair. Certainly, in some otherembodiments, there may be one transverse supporting structure II 22 thatis arranged as a platy structure or the transverse supporting structuresII may be arranged as three, four, five or even more rod-shapedstructures arranged at an interval or not at an interval, or thetransverse supporting structures I may be arranged as other frame bodystructures, so that the stability and bearing performance of the secondframe body unit 2 can further be improved. In some other embodiments,the two transverse supporting structures II 22 may not be arranged.Furthermore, in the embodiment, the two transverse supporting structuresII 22 are arranged in parallel, so that a support-free space is formedbetween the two transverse supporting structures II 22. When the partssuch as back and waist are placed on the second leaning unit 23 arrangedon the second frame body unit 2, the user is more comfortable andrelaxed. Certainly, in some other embodiments, the two transversesupporting structures II 22 can further be arranged in an unparallelmanner such as splay and inverted splay or intersection, so that thestability and bearing performance of the second frame body unit 2 canfurther be improved. In addition, the transverse supporting structure II22 in the embodiment is arranged as a backward concave arc-shapedstructure, so that the attaching areas between the second leaning unit23 in front of the transverse supporting structure II 22 and the partssuch as back and waist are further increased, and thus, the comfortlevels of the parts such as back and waist are further improved.Certainly, in some other embodiments, the transverse supportingstructure II 22 can be further arranged as a frontward convex arc-shapedstructure to improve the stretching range of the parts such as leg,waist, abdomen, back, shoulder and neck, or it is arranged as a straightbody structure for supporting the parts such as back and waist, too.Certainly, the transverse supporting structure II 21 in the embodimentis made of metal materials such as steel and iron, so that the firmnessof the structure is improved. In some other embodiments, the transversesupporting structure II 21 can be further made of materials such as woodand plastics and other materials or made from a combination of thematerials, so that the multifunctional chair is of more diversity.

As shown in FIG. 7, as an embodiment I of the present invention, thethird rotating assembly 8 includes a ratchet wheel 812 with a ratchetwheel arm 811, a ratchet wheel shaft 813, a rotating arm 814, a checkpawl 815, a check pawl shaft 816, a return piece 817 and a restorationpiece 818, where the ratchet wheel arm 811 is connected with the framebody structure II 21; one end of the rotating arm 814 is hinged with theratchet wheel 812 via a ratchet wheel shaft 813 and the other endthereof is connected with the frame body structure I 11; the check pawl815 is hinged with the rotating arm 814 via a check pawl shaft 816 andis arranged corresponding to the ratchet wheel 812, and is used toresist rotation of the ratchet wheel 812; the return piece 817 issleeved on the ratchet wheel shaft 813, one end of the return piece 817is provided with an arc-shaped notch structure 8171, the ratchet wheel812 is provided with an arc-shaped protrusion structure 8121corresponding to the arc-shaped notch 8171, and the other end of thereturn piece 817 is provided with a lug structure 8172 corresponding tothe check pawl 815 to drive the check pawl 815 to leave the ratchetwheel 812; and the restoration piece 818 is a reset spring and is usedto drive the check pawl 815 to lean against the ratchet wheel 812 afterthe check pawl 815 leaves the ratchet wheel 812. In the embodiment, whenthe frame body structure II 21 rotates towards the direction of the headend 101, the ratchet wheel 812 further rotates therewith anti-clockwise,and meanwhile, the check pawl 815 streaks backs of teeth of the ratchetwheel 812 one by one. After the frame body structure II 21 is adjustedto a needed angle, the check pawl 815 is returned to lean against acertain tooth space of the ratchet wheel 812 under elastic action of therestoration piece 818, so that the ratchet wheel 812 is locked, i.e.,the frame body structure II 21 and the frame body structure I 11 arelocked; and when it is needed to rotate the frame body structure II 21towards the direction of the tail end 102, the frame body structure II21 is rotated towards the direction of the tail end 102 first, so thatthe front side of the arc-shaped protrusion structure 8121 on theratchet wheel 812 leans against the front side of the arc-shaped notchstructure 8171 on the return piece 817, and the frame body structure II21 is rotated continuously, so that the arc-shaped protrusion structure8121 pushes the arc-shaped notch structure 8171 to rotate anti-clockwiseuntil the lug structure 8172 pushes the ratchet pawl 835 away from theratchet wheel 812, and then the frame body structure II 21 is rotatedtowards the direction of the tail end 102; after the rear side of thearc-shaped protrusion structure 8121 leans against the rear side of thearc-shaped notch structure 8171 on the return piece 817, the frame bodystructure II 21 is rotated continuously, so that the arc-shapedprotrusion structure 8121 pushes the arc-shaped notch structure 8171 torotate clockwise until the lug structure 8172 leaves the check pawl 815;the check pawl 815 leans against a certain tooth space of the ratchetwheel 812 under the elastic action of the restoration piece 818, so thatthe ratchet wheel 812 is locked, i.e., the frame body structure II 21and the frame body structure I 11 are locked. The third rotatingassembly 8 in the embodiment is simple in structure and easy to operate,so that the frame body structure II 21 connected with the ratchet wheelarm 811 can rotate and can be locked between the head end 101 and thetail end 102 of the frame body structure I 11 connected with therotating arm 834. Certainly, in some other embodiments, the thirdrotating assembly 8 can further be arranged in other ratchet wheelstructures or hinged structures in which the frame body structure II 21can rotate and can be locked between the head end 101 and the tail end102 of the frame body structure I 11, and the frame body structure II 21can further rotate and can be locked between the head end 101 and thetail end 102 of the frame body structure I 11. In addition, there aretwo third rotating assemblies 8 in the embodiment and are respectivelywelded between the frame body structure II 21 and the frame bodystructure I 11 on the same side, so that the adjustability and theadjusting stability can be improved. Certainly, in some otherembodiments, there is only one third rotating assembly 8, and thewelding mode can be replaced by other connecting modes such as threadedconnection, riveting connection, buckling connection and the like, andthe third rotating assemblies 8 can further be arranged between any oneor two of the frame body structure II 21 and the transverse supportingstructures II 22 and any one or two of the frame body structure I 11 andthe transverse supporting structures I 12, so that the second frame bodyunit 2 and the first frame body unit 1 are rotatably connected andlocked.

As shown in FIG. 3, as an embodiment I of the present invention, thefirst connecting position 103 is arranged close to the head end 11 closeto the frame body structure I 11, i.e., the first supporting unit 3 issupported near the head end 101 of the frame body structure I 11, sothat the integral height of the multifunctional chair is reduced and theintegral stability of the multifunctional chair is improved. A distanceis reserved between the head end 101 of the frame body structure I andthe first connecting position 103, so that on the one hand, theconnecting stability between the first supporting unit 3 and the framebody structure I 11 is improved and the falling connection risk isreduced, and on the other hand, the part of structure of the head end101 of the frame body structure I 11 can further be used as a handrail,in particular used to assist the human body to perform various fitnessactions such as sit-up and push-up when the multifunctional chair is inthe second posture of the fitness equipment. In addition, the firstleaning unit 13 is arranged on the frame body structure I 11 along thetail end 102 close to the first connecting position 103, so that thesupporting end surface distracted between the first leaning unit 13 andthe second leaning unit 23 is larger and has a larger contact area withhuman, the origins of force are more scattered, and therefore, thecomfort level is improved. Certainly, in some other embodiments, thefirst connecting position 103 can further be overlapped with the headend 101 of the frame body structure I 11, so that the overall height ofthe multifunctional chair is further reduced, and the integral stabilityof the multifunctional chair is improved. The head end 101 of the framebody structure I 11 is hidden in the first supporting unit 3, so thatthe multifunctional chair is more concise integrally and morebarrier-free to use, or a position close to the head end 101 on aposition close to the frame body structure I 11 is provided with anotherfirst connecting position 103 while the first connecting position 103and the head end 101 of the frame body structure I 11 are overlapped, sothat on a basis of conciseness and no barriers, the connecting stabilityof the first supporting unit 3 and the frame body structure I 11 isimproved and the falling connection risk is reduced. In the embodiment,the first connecting position 103 is arranged on the frame bodystructure I 11, so that the stability and the bearing performance of themultifunctional chair are improved. Certainly, in some otherembodiments, the first connecting position 103 can further be arrangedon the transverse supporting structures I 12 or the frame body structureI 11 and the transverse supporting structures I 12, so that the firstsupporting unit 3 and the transverse supporting structures I 12 areconnected or the frame body structure I 11 and the transverse supportingstructures I 12 are connected jointly, and therefore, the firstsupporting unit 3 can support the head end 101 of the first frame bodyunit 1 or a position close to the head end 101, so that the height ofthe tail end 102 of the first frame body unit 1 is lower than the heightof the first connecting position 103.

As shown in FIG. 1, as an embodiment I of the present invention, thereis one first supporting unit 3, so that it is simple in structure andconvenient to use, carry and transport. Certainly, in some otherembodiments, there are two, three or even more first supporting unit 3to enhance support to the first frame body unit 1, so that the stabilityand the bearing performance of the multifunctional chair are improved.In addition, the first supporting unit 3 is arranged at an angle withmounting end surfaces such as a floor, a ground mat, gravel and variousindoor or outdoor platform surfaces, i.e., the first supporting unit 3is arranged obliquely relative to the mounting end surfaces. In theembodiment, the upper end of the first supporting unit 3 is arrangedinclining backwards, so that the multifunctional chair forms a graduallycontracted structure from bottom to top integrally. All parts of themultifunctional chair are more compact when the first frame body unit 1is stressed, so that it is more stable and firmer in structure.Certainly, in some other embodiments, the upper end of the firstsupporting unit 3 can further be arranged inclining forwards, so thatthe multifunctional chair forms a gradually contracted structure frombottom to top integrally, and parts such as feet and shank can move in abarrier-free manner, or the first supporting unit 3 is arrangedperpendicular to the mounting end surfaces to further form stabletriangular supporting structures with the first frame body unit 1 andthe mounting end surfaces such as the ground, so that themultifunctional chair is placed and used stably.

As shown in FIG. 3, as an embodiment I of the present invention, thefirst supporting unit 3 includes two parallelly arranged firstsupporting pieces 31, the first supporting pieces 31 are arranged inrod-shaped structures, and the upper ends of the two first supportingpieces 31 are respectively connected with the first connecting position103 of the frame body structure I 11 on the same side and the lower endsthereof lean against the mounting end surfaces of mounting media such asthe floor, the ground mat, the gravel and various indoor or outdoorplatforms, so that profiles needed by the first supporting unit 31 aregreatly saved, the cost is saved, the overall weight of themultifunctional chair is alleviated and it is convenient to use andcarry. The two first supporting pieces 31 are arranged in parallel andare arranged in splayed shapes relatively. On the one hand, the overallvolume of the multifunctional chair is reduced, so that it is convenientto place, package, carry and transport. On the other hand, the two firstsupporting pieces 31 and the frame body structure I 11 on the same sideare located on a same plane, and a backward forward supporting force isapplied to the frame body structures I 11 on the same side, so that thesupporting stability is improved. Certainly, in some other embodiments,there is one first supporting piece 31 arranged in a platy structure,and meanwhile, it is connected with the first connecting positions 103on the two frame body structures I 11, or there are three, four, five oreven more rod-shaped structures, so that one frame body structure I 11is respectively connected with a plurality of first supporting pieces31. The two first supporting pieces 31 can further be arranged in suchan unparallel manner of splayed and inverted splayed shapes or arrangedin an intersected manner, so that the two first supporting pieces 31 arerespectively connected with the frame body structures I 11 on theopposite side, which can further support the first connecting positions103 on the first frame body units 1 by the first supporting unit 3.Certainly, the first supporting piece 31 in the embodiment is made ofmetal materials such as steel and iron. In some other embodiments, thefirst supporting piece 31 can be further made of materials such as woodand plastics and other materials or made from a combination of thematerials, so that the multifunctional chair is of more diversity.

As shown in FIG. 3, as an embodiment I of the present invention, thefirst supporting piece 31 is arranged as an integrated structure, sothat the stability of the first supporting unit 3 is improved, and it issimple in structure and convenient to produce and machine.

As shown in FIG. 3, as an embodiment I of the present invention, thefirst supporting unit 3 is rotatably connected with the first frame bodyunit 1 via the first rotating assembly 6, so that the first supportingunit 3 can rotate relative to the first frame body unit 1. On the onehand, by adjusting the relative angle between the first supporting unit3 and the first frame body unit 1, the angle between the mounting endsurface of the first supporting unit 3 relative to the ground and theoverall height of the multifunctional chair are changed, so that thesupporting direction of the first frame body unit 1 by the firstsupporting unit 3 is changed to form different supporting structures.Meanwhile, the positioning unit 9 can move therewith, so that the anglewhen it is used as a foot mat or a presser foot is different, andtherefore, the multifunctional chair is richer in using state. On theother hand, after the first supporting unit 3 is rotated to lean againstthe first frame body unit 1, the first supporting unit 3 can further befolded, so that the integral volume of the multifunctional chair isreduced, and it is convenient to store, package, carry and transport. Inthe embodiment, there are two first rotating assemblies 6. The firstsupporting piece 31 and the frame body structure I 11 on the same sideare connected via one first rotating assembly 6, so that the two firstsupporting pieces 31 rotate respectively relative to the frame bodystructure I 11 on the same side to combine more diversified usingstates. The two supporting pieces 31 can be folded, so that the integralvolume of the multifunctional chair is further reduced, and it isconvenient to store, package, carry and transport. Certainly, in someother embodiments, there may be only one first rotating assembly 6, sothat a certain first supporting piece 31 can rotate and can be foldedrelative to the frame body structure I 11 on the same side, and themultifunctional chair is richer in using state and the integral volumeof the multifunctional chair is reduced.

As shown in FIG. 8, as an embodiment I of the present invention, thefirst rotating assembly 6 includes a connector I 61, a rotating shaft I62 and a limiting piece I 63, where one end of the connector I 61 isconnected with the first connecting position 103 on the frame bodystructure I 11 while the other end thereof is hinged to the firstsupporting pieces 31 via the rotating shaft I 62, so that the firstsupporting piece 31 can rotate relative to the first connecting position103 on the frame body structure I 11. The rotating shaft I 62 isarranged perpendicular to the direction of the frame body structure I11, and the limiting piece I 63 is arranged on the front portion of theconnector I 61, so that the rotating trajectories of the two firstsupporting pieces 31 are defined in a parallel direction of the framebody structure I 11, thereby preventing instability of themultifunctional chair due to inconsistence of the rotating angles andthe directions of the two first supporting pieces 31. In the embodiment,when the first supporting unit 3 is rotated forwards to the front end ofthe first supporting piece 31 relative to the first frame body unit 1 tolean against the limiting piece I 63, i.e., the first supporting unit 3is unfolded under drive by the first supporting piece 31, at the time,the multifunctional chair can be placed on the mounting end surfacessuch as ground to use. When the first supporting unit 3 is rotatedbackwards to the first frame body unit 1 relative to the first framebody unit 1 to lean against the first frame body unit 1, i.e., the firstsupporting unit 3 is folded and contracted under drive of the firstsupporting piece 31, at the time, the integral volume of themultifunctional chair is reduced and it is convenient to store, package,carry or transport. Certainly, in some other embodiments, a lockingpiece can further be arranged to lock the first supporting piece 31 atany angle rotating relative to the connector I 61, so that the firstsupporting piece 31 and the first frame body unit 1 are integrally fixedto different angles and positions for foot mats or presser feet atdifferent angles and positions, and thus, the multifunctional chair isricher in using state. In some other embodiments, the first rotatingassembly 6 can further be arranged in other connecting structures suchas a hinge in such a manner that the first supporting piece 31 rotatesrelative to the frame body structure I 11 and the first frame body unit1 is converted between the unfolded state and the contracted state, sothat it is convenient to use, store, package, carry or transport.

As shown in FIG. 5, as an embodiment I of the present invention, themultifunctional chair further includes a positioning unit 9 arranged onthe first supporting unit 3. When the multifunctional chair is in thefirst state of the reclining chair or the seat, it can further be usedfor placing parts such as feet and shanks, so that the sitting or lyingcomfort level is improved. In the second posture of the fitnessequipment, it can be further used for placing or positioning one of thefeet and shanks, or placing or positioning the feet and shankssimultaneously to assist various stretching actions of legs, waist,abdomen, back, shoulders, neck and the like. It replaces existingindependent fitness equipment completely.

As shown in FIG. 5, as an embodiment I of the present invention, thepositioning unit 9 includes two positioning connectors 91 and apositioning adjusting piece 92, where the positioning connectors 91 arearranged in rod-shaped structures and the two positioning connectors 91are arranged at an interval. Two ends of the two positioning connectors91 are respectively connected with two first supporting pieces 31. Onthe one hand, the two positioning connectors 91 and the two firstsupporting pieces 31 jointly form leaning end surfaces for placing orpositioning parts such as legs and shanks, so that profiles needed bythe positioning unit 9 are saved greatly, the cost is saved, theintegral weight of the multifunctional chair is alleviated, and it isconvenient to use and carry. The two positioning connectors 91 arearranged at an interval, so that the parts such as legs and shanks canbe placed butane the two positioning connectors 91 to limit and supportfront and back two contact surfaces, so that the positioning stabilityis improved. On the other hand, the two positioning connectors 91 areconnected between the two first supporting pieces 31 to further enhancethe stability of the first supporting unit 3. The two first supportingpieces 31 are respectively sleeved with the positioning adjusting pieces92, and the outer ends of the positioning adjusting pieces 92 are formedwith positioning end surfaces leaning against the parts such as legs andshanks, so that the contact area between the two positioning pieces 91and the parts such as legs and shanks is increased, and the comfortlevel is improved. In the embodiment, there are two positioningconnectors 91 which are respectively sleeved with the positioningadjusting pieces 92, so that the parts such as legs and shanks and thepositioning unit 9 have two placing or positioning end surfaces, andtherefore, the comfort level and the positioning stability are improved.Certainly, in some other embodiments, there may only be one, or three,four, five or even more positioning connectors 91. The positioningadjusting pieces 92 can be merely sleeved on a certain positioningconnector 91 or several certain positioning connectors 91 to be combinedor there are no positioning adjusting pieces 92, which can also be usedfor placing or positioning the parts such as legs and shanks. Inaddition, fixed connection structures such as welding and rivetingstructures can be adopted between the positioning connectors 91 and thefirst supporting pieces 31, so that the stability of the structure isimproved. Detachable connection structures such as threaded structures,screws and dowels can be adopted, too, so that the multifunctional chairis converted between a condition with the positioning unit and acondition without the positioning unit, and therefore, themultifunctional chair is more diversified. Rotatable connectionstructures are adopted, so that the positioning connectors 91 can rotaterelative to the first supporting pieces 31 to massage the parts such aslegs and shanks, thereby enriching the functionality of themultifunctional chair. Similarly, fixed connection structures such aswelding and gluing structures can be adopted between the positioningconnectors 91 and the first supporting pieces 31, so that the stabilityof the structure is improved. Detachable connection structures such asclamping connection structures, threaded structures, and interferencefitting connection structures can be adopted, too, so that themultifunctional chair is converted between a condition with thepositioning adjusting pieces and a condition without the positioningadjusting pieces, and therefore, the multifunctional chair is morediversified. Rotatable connection structures are adopted, so that thepositioning adjusting pieces 92 can rotate relative to the positioningconnectors 91 to massage the parts such as legs and shanks, therebyenriching the functionality of the multifunctional chair. Certainly, thepositioning connectors 91 in the embodiment are made of metal materialssuch as steel and iron, so that the firmness of the structure isimproved. In some other embodiments, the positioning connectors 91 canbe further made of materials such as wood and plastics and othermaterials or made from a combination of the materials, so that themultifunctional chair is of more diversity.

As shown in FIG. 5, as an embodiment I of the present invention, thepositioning adjusting pieces 92 are arranged as flexible structures suchas a sponge body, a foam body and a soft silica structure, so that thecomfort levels of the parts such as legs and shanks placed or positionedon the positioning adjusting pieces 92 are further enhanced. Certainly,in some other embodiments, the positioning adjusting pieces 92 canfurther be arranged in hard structures such as steel, iron, plastics andhard silica gel and can further increase the contact area between thetwo positioning connectors 91 and the parts such as legs and shanks, sothat the comfort level is improved properly.

As shown in FIG. 2, as an embodiment I of the present invention, themultifunctional chair further includes a second supporting unit 4 forsupporting the rear portion of the first frame body unit 1 so as to keepbalance of the integral multifunctional chair. In the embodiment, thesecond supporting unit 4 is formed by the tail end 102 of the firstframe body unit 1, so that the structure is simplified, and it isconvenient to produce and machine. Certainly, in some other embodiments,the second supporting unit 4 can further be formed by the main body onthe first frame body unit 1 close to the tail end 102 and the tail end102 jointly, i.e., is formed by the first frame body unit 1 which islarger, or is merely formed by the main body on the first frame bodyunit 1 close to the tail end 102, or is independently arranged with thesecond supporting unit 4 and is connected with the tail end 102 of thefirst frame body unit 1 or a position close to the tail end 102, tofurther support the rear portion of the first frame body unit 1 to keepbalance of the integral multifunctional chair.

As shown in FIG. 4, as an embodiment I of the present invention, thereis one second supporting unit 4, so that it is simple in structure andconvenient to use, carry and transport. Certainly, in some otherembodiments, there are two, three or even more second supporting unit 4to enhance support to the rear portion of the first frame body unit 1,so that the stability and the bearing performance of the multifunctionalchair are improved. In addition, the second supporting unit 4 isarranged at an angle with mounting end surfaces such as a floor, aground mat, gravel and various indoor or outdoor platform surfaces,i.e., the second supporting unit 4 is arranged obliquely relative to themounting end surfaces. In the embodiment, the upper end of the secondsupporting unit 4 is arranged inclining backwards, so that themultifunctional chair forms a gradually contracted structure from bottomto top integrally. All parts of the multifunctional chair are morecompact when the first frame body unit 1 is stressed, so that it is morestable and firmer in structure. The second supporting unit forms anextended shape of the first frame body unit 1 due to the angle of theupper end of the second supporting unit 4 inclining forwards, so that itis simple in structure and easy to produce and machine, and can form thestable triangular supporting structures with the first frame body unit1, the first supporting unit 3 and the mounting end surface such asground, and therefore, the multifunctional chair is placed and usedstably. Certainly, in some other embodiments, the upper end of thesecond supporting unit 4 can further be arranged inclining forwards, sothat the multifunctional chair forms a gradually contracted structurefrom bottom to top integrally, and the tail end 102 of the first framebody unit 1 and the mounting end surfaces such as ground have a certainheight, so that it can move below the tail end 102 of the first framebody unit 1 in a barrier-free manner, or the second supporting unit 4 isarranged perpendicular to the mounting end surfaces to support the frontand rear ends of the frame body unit 1 with the first supporting unit 3jointly, so that the multifunctional chair is placed and used stably.

As shown in FIG. 5, as an embodiment I of the present invention, thesecond supporting unit 4 includes two parallelly arranged secondsupporting pieces 41, the second supporting pieces 41 are arranged asrod-shaped structures, the second supporting pieces 41 are respectivelyformed by the frame body structures I 11 on the same side, and the lowerends of the second supporting pieces 41 lean against the mounting endsurfaces of mounting media such as the floor, the ground mat, the graveland various indoor or outdoor platforms, so that profiles needed by thesecond supporting unit 41 are greatly saved, the cost is saved, theoverall weight of the multifunctional chair is alleviated and it isconvenient to use and carry. The two second supporting pieces 41 arearranged in parallel and are arranged in splayed shapes relatively. Onthe one hand, the overall volume of the multifunctional chair isreduced, so that it is convenient to place, package, carry andtransport. On the other hand, the two second supporting pieces 41 andthe frame body structure I 11 on the same side are located on a sameplane, and a backward forward supporting force is applied to the framebody structures I 11 on the same side, so that the supporting stabilityis improved. Certainly, in some other embodiments, there is one secondsupporting piece 41 arranged in a platy structure, and meanwhile, it isconnected with the two frame body structures I 11, or there are three,four, five or even more rod-shaped structures, so that one frame bodystructure I 11 is respectively connected with a plurality of secondsupporting pieces 41. The two second supporting pieces 41 can further bearranged in such an unparallel manner of splayed and inverted splayedshapes or arranged in an intersected manner, so that the two secondsupporting pieces 41 are respectively connected with the frame bodystructures I 11 on the opposite side, which can further support the rearportion of the first frame body unit 1 by the second supporting unit 4.Certainly, the second supporting piece 41 in the embodiment is made ofmetal materials such as steel and iron, so that the firmness of thestructure is improved. In some other embodiments, the second supportingpiece 41 can be further made of materials such as wood and plastics andother materials or made from a combination of the materials, so that themultifunctional chair is of more diversity.

As shown in FIG. 5, as an embodiment I of the present invention, thesecond supporting piece 41 is arranged as an integrated structure, sothat the stability of the second supporting unit 4 is improved, and itis simple in structure and convenient to produce and machine.

As shown in FIG. 5, as an embodiment I of the present invention, thesecond supporting unit 4 further includes a first reinforcing piece 42between the two second supporting pieces 41 for enhancing the stabilityand the bearing performance of the structure of the second supportingunit 4. The second reinforcing piece 42 is arranged as the rod-shapedstructure, so that profiles needed by the second reinforcing piece 42 issaved greatly, the cost is saved, the overall weight of themultifunctional chair is alleviated, and it is convenient to use andcarry. Certainly, in some other embodiments, there may be two, three oreven more second reinforcing pieces 42 to further enhance the stabilityof the second supporting unit 4. The rod body structure can be replacedby a platy structure or other structures, which may realize an effect ofenhancing the stability and the bearing performance of the structure ofthe second supporting unit 4. In addition, the second reinforcing pieces42 are arranged between the tail ends of the two supporting pieces 41,so that the contact areas between the second supporting units 4 and themounting end surfaces such as ground are increased, and the stability ofplacing the chair is improved. Certainly, in some other embodiments, thesecond reinforcing pieces 42 are arranged between other position of thetwo supporting pieces 41, which may realize an effect of enhancing thestability and the bearing performance of the structure of the secondsupporting unit 4. Certainly, the second reinforcing piece 41 in theembodiment is made of metal materials such as steel and iron, so thatthe firmness of the structure is improved. In some other embodiments,the second reinforcing piece 41 can be further made of materials such aswood and plastics and other materials or made from a combination of thematerials, so that the multifunctional chair is of more diversity.

As shown in FIG. 2, as an embodiment I of the present invention, themultifunctional chair further includes a handrail structure 14. Thehandrail structure 14 is sleeved outside the head end 101 of the framebody structure I 11, so that the contact area when the head end 101 ofthe frame body structure I 11 is grasped by a hand is increased, andtherefore, the using comfort level is improved, in particular, it isfavorable to assist the human body to perform various fitness actionssuch as sit-up and push-up when the multifunctional chair is in thesecond posture of the fitness equipment. In the embodiment, the handrailstructure 14 is arranged outside the head end 101 of the frame bodystructure I 11, so that it is favorable to mount, detach and use andconvenient to produce and machine. It further has an anti-collisioneffect in the position of the head end 101. Certainly, in some otherembodiments, the handrail structure 14 can further be arranged on otherpositions of the frame body structure I 1, or can be arranged on any oneof or a combination of several of the transverse supporting structures I12, the first leaning unit 13, the first rotating assemblies 6, thefirst supporting pieces 31, the positioning connectors 91, thepositioning adjusting pieces 92, the frame body structures II 21, thetransverse supporting structures II 22 or the second leaning unit 23,which may realize an effect of assisting the human body to performvarious fitness actions such as sit-up and push-up. In addition, in theembodiment, the handrail structure 14 is in flexible structures such asa sponge body, a foam body or a soft silica gel structure, so that thegrasping comfort level is improved. Certainly, in some otherembodiments, the handrail structure 14 can further be in rigidstructures such as a steel body, an iron body and a body, so that theusing comfort level can be properly improved.

As shown in FIG. 2, as an embodiment I of the present invention, thehandrail structure 14 is rotatably connected with the head end 101 ofthe frame body structure I 11, and the handrail structure 14 can rotaterelative to the frame body structure I 11 after being grasped, so thatit is convenient to assist the human body to perform various fitnessactions such as hand and wrist twisting, and therefore, the fitnesseffect is improved. Certainly, in some other embodiments, the handrailstructure 14 can further be connected with the head end 101 of the framebody structure I 11 via fixed connection structures such as welding,gluing connection structures, so that the connecting stability isimproved, or via detachable connection structures such as threadconnection structures, screw connection structures, clamping connectionstructures and interference fitting connection structures, which isconvenient to replace handrail structures 14 of different types.

As shown in FIG. 9, as an embodiment I of the present invention, thefirst leaning unit 13 includes a first leaning structure 131, the firstleaning structure 131 is mainly used for contacting and supporting theparts such as hip and legs when the human body sits or lies down, thefirst leaning structure 131 is arranged on the frame body structure I11, and the first leaning structure 131 is formed by extending along thedirection close to the tail end 102 of the first frame body unit 1 fromthe rear end close to the first connecting position 103. On the onehand, the front end of the first leaning structure 131 is arranged closeto the first connecting position 103 supported by the first supportingpiece 31, so that the first leaning structure 131 is located between thefirst connecting position 103 on the frame body structure I 11 and thefirst rotating assembly 6 in a large area, so that it is ensured thatthe first leaning structure 131 has an contact end surface large enoughand is not intersected with the first connecting position 103 or thefirst rotating assembly 6, and therefore, it is convenient to mount anddetach. On the other hand, a suspending space is reserved between thefront end of the first leaning structure 131 and the positioning unit 4to place and position the parts such as legs and shanks, a suspendingspace is reserved between the front end of the first leaning structure131 and the handrail structure 14 to place the parts such as legs andshanks, and the parts such as legs and shanks are blocked in thesuspending space via the handrail structure 14 to further position theparts such as legs and shanks, and collision to the parts such as legsand shanks by the outer side can be prevented. Certainly, in some otherembodiments, the front end of the first leaning structure 131 canfurther be arranged on the first connecting position 103, can furtherreserve the suspending space for placing and positioning the parts suchas legs and shanks on a basis of ensuring that the first leaning unit 13has the contact end surface large enough, or is formed by extendingalong the direction close to the tail end 102 of the first frame bodyunit 1 from the front end close to the first connecting position 103.The rear end of the first leaning structure 131 can further be arrangedin a position on the frame body structure I 11 connected with the firstrotating assembly 6, or is arranged behind the position on the framebody structure I 11 connected with the first rotating assembly 6 and iseven arranged at the tail end 102 of the first frame body unit 1, whichcan further support the parts such as hip and legs by the first leaningunit 3. Certainly, in some other embodiments, the first leaningstructure 131 can further be arranged on the transverse supportingstructures I 12, or is arranged on the frame body structure I 11 and thetransverse supporting structures I 12, which can further support theparts such as hip and legs.

As shown in FIG. 9, as an embodiment of the present invention, the firstleaning structure 131 is connected with the frame body structure I 11via the first connecting assembly 132, so that the first leaningstructure 131 is detachably connected to the frame body structure I 11,and therefore, it is convenient to clean the first leaning structure131, or the first leaning structures 131 of different types can bereplaced according to different demands, so that the multifunctionalchair is more diversified. In the embodiment, the frame body structure I11 is provided with a groove type structure with an opening. The firstconnecting assembly 132 is arranged in a clamping strip structurematched with the groove type structure. The first leaning structure 131is in buckling connection with the groove type structure on the framebody structure I 11 via the clamping strip structure, so that it isconvenient to mount and detach. In some other embodiments, the groovetype structure and the clamping strip structure can further be arrangedin other buckling structures or any one detachable connection structuresuch as a hook structure and a pasting structure or a combination ofseveral detachable connection structures, so that it is convenient toclean and replace the first leaning structures 131 of different types.Certainly, in some other embodiments, there may be no first connectingassembly 132. Part of or all structures of the end portion of the firstleaning structure 131 are wrapped outside the frame body structure I 11and are connected with the frame body structure I 11, so that thestructure is simplified and it is convenient to produce and machine.

As shown in FIG. 10, as an embodiment I of the present invention, thesecond leaning unit 23 includes a second leaning structure 231, thesecond leaning structure 231 is mainly used to contact and support theparts such as back and waist of the human body sitting or lying, thesecond leaning structure 231 is arranged on the frame body structure II21, and is formed by extending along the direction close to the otherend of the frame body structure II 21 from an end close to the framebody structure II 21. In the embodiment, two ends of the second leaningstructure 231 are arranged close to two ends of the frame body structureII 21 respectively, so that the second leaning structure 231 is arrangedon the frame body structure II 21 in a large area, and therefore, it isensured that the second leaning structure 231 has the contact endsurface large enough, and it is convenient to mount and detach.Certainly, in some other embodiments, the second leaning structure 231can further be arranged in part of regions on the frame body structureII 21, so that the second leaning structure 231 has the contact endsurface relatively small, and the leaning structure 231 can support theparts such as hip and legs. Certainly, in some other embodiments, thesecond leaning structure 231 can further be arranged on the transversesupporting structures II 22, or is arranged on the frame body structureII 21 and the transverse supporting structures II 22, which can furthersupport the parts such as hip and waist.

As shown in FIG. 10, as an embodiment of the present invention, thesecond leaning structure 231 is connected with the frame body structureII 21 via the second connecting assembly 232, so that the second leaningstructure 231 is detachably connected to the frame body structure II 21,and therefore, it is convenient to clean the second leaning structure231, or the second leaning structures 231 of different types can bereplaced according to different demands, so that the multifunctionalchair is more diversified. In the embodiment, the frame body structureII 21 is provided with a groove type structure with an opening. Thesecond connecting assembly 232 is arranged in a clamping strip structurematched with the groove type structure. The second leaning structure 231is in buckling connection with the groove type structure on the framebody structure II 21 via the clamping strip structure, so that it isconvenient to mount and detach. In some other embodiments, the groovetype structure and the clamping strip structure can further be arrangedin other buckling structures or any one detachable connection structuresuch as a hook structure and a pasting structure or a combination ofseveral detachable connection structures, so that it is convenient toclean and replace the second leaning structures 231 of different types.Certainly, in some other embodiments, there may be no second connectingassembly 232. Part of or all structures of the end portion of the secondleaning structure 231 are wrapped outside the frame body structure II 21and are connected with the frame body structure I 11, so that thestructure is simplified and it is convenient to produce and machine.

As shown in FIG. 9 to FIG. 10, as an embodiment I of the presentinvention, the first leaning structure 131 and the second leaningstructure 231 are arranged as cloth structures, so that the cost islowered. Certainly, the cloth structures can be made from elasticmaterials, so that the flexibility when the human sits or lies down isimproved. The cloth structures can further be made from non-elasticmaterials, so that the hardness when the human sits or lies down isimproved. In some other embodiments, the cloth structures can further bereplaced by any one of or a combination of several of other structuressuch as leather structures, bamboo structures, rattan structures,plastic structures and wooden structures, which may contact and supportthe parts such as hip, legs, back and waist when the human body sits orlies down, and the multifunctional chair is more diversified.

As shown in FIG. 6, as an embodiment I of the present invention, theframe body structure I 11 is arranged as the upward-convex arc-shapedstructure, in particular the upward-convex arc-shaped structuregradually descending along the direction of the tail end 102 along thefirst connecting position 103 of the frame body structure I 11; theframe body structure II 21 is arranged as the upward-convex arc-shapedstructure matched with the tail end 102 of the frame body structure I11; as the first leaning unit 13 is formed by extending along thedirection of the tail end 102 from a position close to the firstconnecting position 103, when the multifunctional chair is in the firstposture of the reclining chair or the seat, the human body canintegrally sit on or lie down the first leaning unit 13 and the secondleaning unit 23 arranged on the first frame body unit 1 and the secondframe body unit 2 obliquely backwards, so that the whole body ispressure-relieved and relaxed. Further, due to the upward-convexarc-shaped structure, the parts such as hip, legs, back and waist betterfit the first leaning unit 13 and the second leaning unit 23, and theforce bearing points are further scattered, and the human body feel morecomfortable and relaxed; when the multifunctional chair is in the secondposture of the fitness equipment, the human body can lie on the firstleaning unit 13 and the second leaning unit 23 arranged on the firstframe body unit 1 and the second frame body unit 2 in an integralgradual descending posture from the edge of the first connectingposition 103 close to the first leaning unit 13 to perform fitnessactions such as sit-up. Compared with reclining on a plane to performthe actions, the fitness strength is enhanced, and the fitness effect isimproved, i.e., the stretching amplitude of the parts such as legs,waist, abdomen, back, shoulders and neck is increased, the fitnesseffect is improved; and it is in the gradual descending postureintegrally, so that it better meets the human body structure, and it ismore comfortable to perform fitness actions such as sit-up. Certainly,in some other embodiments, the frame body structure I 11 can further bearranged such that a certain position between the first connectingposition 103 and the tail end 102 is higher than the upward-convexarc-shaped structure of the first connecting position 103, so that whenthe multifunctional chair is in the first posture of the reclining chairor the seat, only the upper part of the body and the hip and the like ofthe human body sits or lies down on the first leaning unit 13 and thesecond leaning unit 23 arranged on the first frame body unit 1 and thesecond frame body unit 2 obliquely backwards, so that a certain pressurerelieving and relaxing function is realized. When the multifunctionalchair is in the second posture, the human body can enable the parts suchas the half part of the body and the hip to lie down on the firstleaning unit 13 and the second leaning unit 23 arranged on the firstframe body unit 1 and the second frame body unit 2 in the gradualdescending posture to perform fitness actions such as sit-up. Comparedwith reclining on a plane to perform the actions, the fitness strengthcan be enhanced and existing independent fitness equipment is replaced,or the frame body structure I 11 can further be arranged as a straightbody structure. As the tail end 102 of the frame body structure I 11 islower than the first connecting position 103, the attaching area can beincreased to a certain extent, and therefore, the comfort level isimproved. The relative angle between the first leaning unit 13 on theframe body structure I 11 and the second leaning unit 23 on the framebody structure II 21 is equal to 180 degrees, so that the stretchingamplitude of the parts such as legs, waist, abdomen, back, shoulders andneck is increased compared with the prior art, and the fitness effect isimproved.

As shown in FIG. 11 to FIG. 13, as an embodiment II of the presentinvention, disclosed is a multifunctional chair. The difference betweenthe embodiment II and the embodiment I lies in that the multifunctionalchair further includes a third supporting unit 5, where the thirdsupporting unit 5 is arranged on the lower rear side of the second framebody unit 2, and the lower end of the third supporting unit 5 leansagainst the first frame body unit 1. In the embodiment, on a basis oflocking the frame body structure II 21 and the frame body structure I 11connected therewith via the third rotating assembly 8 in the embodimentI, by additionally arranging the third supporting unit 5, the thirdsupporting unit 5 supports and further locks the rear portion of thesecond supporting unit 2, so that the stability and the bearingperformance of the second frame body unit 2 are further enhanced whenthe multifunctional chair is in the first posture of the reclining chairor the seat, the second frame body unit 2 is prevented from rotatingbackwards after being stressed after the parts such as back and waistlean against the second frame body unit 2, and a supporting forcetowards the upper front side is applied to the rear portion of thesecond frame body unit 2, so that it is more forward and direct tosupport the second frame body unit 2 after being stressed by the thirdsupporting unit 5, and therefore, the supporting effect is better.Certainly, in some other embodiments, the third supporting unit 5 canfurther be arranged right below or on the front lower side of the secondframe body unit 2 or directions combining the several directions, so asto apply right-above and rear-above supporting forces or tensile forcesto the second frame body unit 2, so that the stability and the bearingperformance of the second frame body unit 2 when the multifunctionalchair is in the first posture of the reclining chair or the seat can beenhanced. In some other embodiments, the lower end of the thirdsupporting unit 5 can further lean against the second supporting unit 4,which also has an equivalent effect. In some other embodiments, thethird supporting piece 51 can be rotatably connected with the frame bodystructure I 11, too, and the third adjusting assembly 52 is arranged onthe frame body structure II 21, which also has an equivalent effect.

As shown in FIG. 11, as an embodiment II of the present invention, thethird supporting unit 5 includes the third supporting piece 51 and thethird adjusting assembly 52, where the upper end of the third supportingpiece 51 is rotatably connected with movable ends of the two frame bodystructures II 21 respectively and the lower end thereof is adjustablyconnected with the third adjusting assembly 52, so that the thirdsupporting piece 51 can rotate relative to the frame body structures II21 at the connecting position with the frame body structures II 21. Thelower end of the rotated third supporting piece 51 is connected with anew position of the third adjusting assembly 52 after the thirdadjusting assembly 52 is adjusted, so that the supporting angle of thethird supporting piece 51 to the frame body structures II 21 isadjusted, and therefore, different distracting angles between the secondleaning unit 23 on the frame body structure II 21 and the first leaningunit 13 on the frame body structures I 11 are supported. There are twothird adjusting assemblies 52, and the two third adjusting assemblies 52are correspondingly arranged on the two frame body structures I 11 toadjust the position of the lower end of the third supporting piece 51relative to the two frame body structures I 11. Certainly, a fixedconnection structure such as welding and riveting connection structurescan be adopted between the third adjusting assembly 52 and the framebody structure I 11, so that the connecting stability is enhanced. Adetachable connection structure such as a threaded structure, a screwand a buckle can be further adopted, so that it is convenient toassembly or replace. In addition, in some other embodiments, the thirdadjusting assembly 52 can further be arranged on the second supportingpiece 41 or the second reinforcing piece 42 or a combination of severalparts, which also has the equivalent effect. In some other embodiments,there may be no third adjusting assemblies 52, the lower end of thethird supporting piece 51 is adjustably connected with the frame bodystructure I 11 directly to adjust the position of the lower end of thethird supporting piece 51 relative to the two frame body structures I11.

As shown in FIG. 13, as an embodiment II of the present invention, thethird adjusting assembly 52 includes an adjusting piece III 521, theadjusting piece III 521 is provided with several adjusting channels III522, each of the adjusting channels III 522 is arranged to be matchedwith the lower end of the third supporting piece 51 to connect, lock andsupport the lower end of the third supporting piece 51 so as to improvethe stability of the third supporting unit 5 on the frame bodystructures II 21, and meanwhile, the adjusting channel III 522 isarranged to be matched with the rotating angel of the third rotatingassembly 8, so that when a distracting angle between the second leaningunit 23 on the frame body structure II 21 and the first leaning unit 13on the frame body structure I 11 is locked at any angle of the thirdrotating assembly 8, there is one adjusting channel III 522corresponding to the lower end of the third supporting piece 51supported with the frame body structure II 21 at an angle at the time onthe adjusting piece III 521, so that the second frame body unit 2 issupported and locked under a condition that each angle is locked.Certainly, in some other embodiments, the adjusting channel III 522 canfurther be arranged to be merely matched with the part of rotating angleof the third rotating assembly 8, so that the third supporting unit 5 ismerely used for further support at the part of distracting angle betweenthe second leaning unit 23 on the frame body structure II 21 and thefirst leaning unit 13 on the frame body structure I 11, so that thesupporting stability to the frame body structure II 21 by the thirdsupporting unit 5 can be improved.

As shown in FIG. 13, as an embodiment II of the present invention, theadjusting channel III 522 is arranged as a groove type structure openedin the upper end. The third supporting piece 51 includes two supportingpieces III 511 and a clamping piece III 512, where the upper ends of thetwo supporting pieces III 511 are rotatably connected with the two framebody structures II 21 via hinging pieces 513 and the lower ends thereofare respectively connected with positions of the clamping piece 512close to two end portions. The clamping piece III 512 between theposition where the two supporting pieces III 511 are connected with theclamping piece III 512 and two end portions of the clamping piece III512 is used for clamping connection with the groove type structure, sothat the lower end of the third supporting piece 51 is supported andlocked in a certain adjusting channel III 522. In the embodiment, thegroove type structure is arranged to be matched with the structure ofthe area between the end portion of the clamping piece III 512 and theposition connected with the third supporting piece III 511 to enhancethe supporting stability of the third adjusting assembly 52 to the lowerend of the third supporting piece 51. The clamping piece III 512 isintegrally arranged as the cylindrical rod-shaped structure. The groovetype structure is arranged as a corresponding U-shaped groove structure,so that it is convenient to clamp the clamping piece III 512 from eachangle and direction into the adjusting channel III 522 from the opening,and it is easy to operate, simple in structure and easy to produce andmachine. Certainly, in some other embodiments, the structure of the areafrom the end portion to the position connected with the third supportingpiece III 511 is merely arranged as the cylindrical structure by theclamping piece III 512 but the structure of the area between thepositions connected with the two supporting pieces III 511 is arrangedas other structures such as square structures and polygonal structures,so that it is further convenient to clamp the clamping piece III 512into the adjusting channel III 522 from each angle and direction fromthe opening, or the clamping piece III 512 is arranged as otherstructures such as square structures and polygonal structures matchedwith the groove type structure, or other structures not matched with thegroove type structure, so that the lower end of the third supportingpiece 51 can further be supported and locked in a certain adjustingchannel III 522. In the embodiment, the opening of the groove typestructure is formed by the clamping portion I 523 and the clampingportion II 524 at an interval; an interval width between the clampingportion I 523 and the clamping portion II 524 is smaller than the widthof the groove type structure, and the clamping portion I 523 and theclamping portion II 524 are made from slightly elastic materials, sothat after the end portion of the clamping piece III 512 is clamped intothe groove type structure, the clamping piece III 512 is firmly definedin the groove type structure by means of the clamping portion I 523 andthe clamping portion II 524 to prevent looseness. The clamping portion I523 slightly protrudes outside the inner side of the groove typestructure, the clamping portion II 524 further protrudes outside theinner side of the groove type structure relatively, i.e., the endportion of the clamping piece III 512 is defined by the clamping portionII 524, so that when the frame body structure II 21 rotates along adirection of the head end 101 or the tail end 102 of the frame bodystructure I 11, it drives the third supporting piece 51 to move forwardsor backwards relative to the third adjusting assembly 52, i.e., two endsof the clamping piece III 512 are respectively separated from a certainadjusting channel III 522 and slide along the upper end surfaces ofseveral clamping portions I 523 and clamping portions II 524, and afterthe frame body structure II 21 is adjusted to a needed angle, the framebody structure II 21 or the third supporting piece 51 is presseddownwards, the clamping piece III 512 is stressed to be clamped intoanother adjusting channel III 522, so that it is simpler to operate andmore convenient to use. Certainly, in some other embodiments, theopening of the groove type structure can further be arranged as otherstructures which are narrower than the groove type structure, and theclamping piece III 512 can further be firmly defined in the groove typestructure to prevent looseness. When it is unnecessary to use the thirdsupporting unit 5, it is only necessary to separate the clamping pieceIII 512 from the adjusting piece III 521, and the third supporting unit5 can be folded and contracted behind the second frame body unit 2 byrotating the hinge piece III 513 relative to the frame body structure II21 without affecting use of the multifunctional chair as the seat, thereclining chair or the fitness equipment. Certainly, the thirdsupporting piece 51 in the embodiment is made of metal materials such assteel and iron, so that the firmness of the structure is improved. Insome other embodiments, the third supporting piece 51 can be furthermade of materials such as wood and plastics and other materials or madefrom a combination of the materials, so that the multifunctional chairis of more diversity. Certainly, the third supporting unit 5 in theembodiment can further be used in other embodiments, so that themultifunctional chairs in other embodiments further have the effect.

As shown in FIG. 14 to FIG. 16, as an embodiment III of the presentinvention, disclosed is a multifunctional chair. The difference betweenthe embodiment III and the embodiment II lies in that the third rotatingassembly 8 includes the connector III 821 and the rotating shaft 822,where the connector III 821 is connected with the frame body structureII 21, and one end of the rotating shaft III 822 is connected with theframe body structure I 11 and the other end thereof is rotatablyconnected with the connector III 821. In the embodiment, structures suchas the ratchet wheel arm 811, the ratchet wheel 812, the ratchet wheelshaft 813, the rotating arm 814, the check pawl 815, the check pawlshaft 816, the return piece 817 and the restoration piece 818 in theembodiment II are replaced by the connector III 821 and the rotatingshaft 822, so that the structure is simplified, and therefore, it isconvenient to produce and machine. In the embodiment, the connector III821 can rotate in an omnibearing manner at 360 degrees relative to therotating shaft 822. When the multifunctional chair is in the firstposture of the reclining chair or the seat, the second frame body unit 2can be rotated in a barrier-free manner along the direction of the headend 101 or the tail end 102 of the first frame body unit 1 and therotated angle and position are locked via the third supporting piece 5,so that the second frame body unit 2 is fixed relative to the distractedangle of the first frame body unit 1, and therefore, the distractedangle range of the frame body structure II 21 relative to the frame bodystructure I 11 is enlarged. It is easy to operate, wide in using rangeand suitable for more crowds. Certainly, a fixed connection structuresuch as welding and riveting connection structures can be adoptedbetween the connector III 821 and the frame body structure II 21 andbetween the rotating shaft III 822 and the frame body structure I 11, sothat the connecting stability is enhanced. A detachable connectionstructure such as a screw and a buckle can be further adopted, so thatit is convenient to assembly or replace. In addition, in some otherembodiments, the frame body structure II 21 and the frame body structureI 11 can be rotatably connected directly through the rotating shaft orother hinge structures, so that the second frame body unit 2 can berotated in a barrier-free manner at 360 degrees relative to thedirection of the head end 101 or the tail end 102 of the first framebody unit 1. In some other embodiments, the connector III 821 can beconnected with the frame body structure I 11, too, and the rotatingshaft 822 is connected with the frame body structure II 21, which alsohas an equivalent effect. Certainly, the third rotating unit 8 in theembodiment can further be used in other embodiments, so that themultifunctional chairs in other embodiments further have the effect.

As shown in FIG. 17 to FIG. 19, as an embodiment IV of the presentinvention, disclosed a multifunctional chair, the difference between theembodiment IV and the embodiment III lies in that the frame bodystructure I 11 is arranged as a split structure, including a frame bodyportion I 111 and a frame body portion II 112, where the frame bodyportion II 112 and the frame body portion I 111 are pivotably connected,and the frame body portion II 112 can be rotated relative to the framebody portion I 111, so that an angle formed between the frame bodyportion I 111 and the frame body portion II 112 is changed. In theembodiment, when the frame body portion II 112 is rotated relative tothe frame body portion I 111 to lean against the frame body portion I111, the frame body portion II 112 can be folded and contracted, so thaton a basis of folding and contracting the first supporting unit 3 andthe positioning unit 9 of the multifunctional chair in the embodimentIII, the frame body portion II 112 is further folded and contracted, andthe multifunctional chair is fully folded and contracted completely, andtherefore, the integral volume of the multifunctional chair is reducedgreatly, and it is more convenient to store, package, carry ortransport. When the frame body portion II 112 is rotated to an originalstate relative to the frame body portion I 111, the frame body portionII 112 can be unfolded to use. Certainly, a pivotal connector betweenthe frame body portion I 111 and the frame body portion II 112 can be apivotal connector which enables the frame body portion II 112 to berotatably contracted relative to the frame body portion I 111 and toform the upward-convex arc-shaped structure of the original frame bodystructure I 11 when being unfolded to use. The pivotal connector in theembodiment is the pivotal structure I 113, where the pivotal structure I113 includes a frame body portion III 115 and two pivotal connectors I114 hinged to two ends of the frame body portion III 115, so that theframe body portion I 111 and the frame body portion II 112 can berespectively hinged with the two pivotal connectors I 114 and arerespectively folded and contracted relative to the two ends of the framebody portion III 115. Compared with pivotal connection between the framebody portion I 111 and the frame body portion II 112 via one pivotalconnector I, the folded and contracted multifunctional chair is morecompact in structure in the embodiment, so that conditions that thefirst frame body unit 1 is resisted, is unsmoothly contracted and thelike in the folding and contracting process due to its own structure areavoided. The frame body portion III 115 is arranged in a shape of theframe body structure I 11, so that the frame body structure I 11 withthe foldable and contractible effect still keeps the upward-convex arcshape on the original frame body structure I 11, and has the usingeffect, for the first posture of the reclining chair or the seat and thesecond posture of the fitness equipment, similar with that of theoriginal frame body structure I 11. Certainly, in some otherembodiments, the frame body portion III 115 can further be arranged inother shapes, such as downward-convex arc shapes or straight rod shapes,different from those of the frame body structure I 11, so thatconditions that the first frame body unit 1 is resisted, is unsmoothlycontracted and the like in the folding and contracting process due toits own structure are avoided. In the embodiment, the frame body portionII 112 can be folded and contracted below the frame body portion I 111.As the frame body structure I 11 is arranged as the upward-convexarc-shaped structure, the folded and contracted multifunctional chair ismore compact in structure, and damage caused by collision in storing,packaging or transporting processes can be prevented. Meanwhile, as theframe body structure II 21 can rotate in a barrier-free manner at 360degrees relative to the frame body structure I 11, the second frame bodyunit 2 and the third supporting unit 5 can be folded and contractedbelow the frame body portion I 111, so that the integral volume of themultifunctional chair is further decreased. Furthermore, as thetransverse supporting structures I 12 and the transverse supportingstructures II 22 are all arranged at an interval, the folded andcontracted transverse supporting structures I 12 and transversesupporting structures II 22 can be placed in a staggered manner, so thatthe folded and contracted multifunctional chair is more compact instructure, the integral volume of the multifunctional chair is decreasedagain, and it is more convenient to store, package, carry or transport.Certainly, in some other embodiments, the frame body portion I 111 andthe frame body portion 112 can further be merely connected via onepivotal connector I 114, so that the frame body portion II 112 can befolded and contracted below the frame body portion I 111. In some otherembodiments, the frame body portion II 112, the second frame body unit 2and the third supporting unit 5 can be folded and contracted above theframe body portion I 111, so that the integral volume of themultifunctional chair is decreased again, and it is more convenient tostore, package, carry or transport. In the embodiment, there is only onepivotal structure I 113, so that the frame body structure I 11 can beintegrally folded and contracted. In some other embodiments, the framebody structure I can further be provided with two, three or even morepivotal structures I 113, so that the frame body structure I 11 hasthree-folded, four-folded or even more-fold contracting effect. In someother embodiments, the frame body portion I 111 can be connected withthe frame body portion II 112 via a telescopic structure. The integralvolume of the multifunctional chair can further be reduced by way ofdecreasing the overall length of the frame body structure I 11, and itis more convenient to store, package, carry or transport. Certainly, theframe body structure I 11 in the embodiment can further be used in otherembodiments, so that the multifunctional chair in other embodimentsfurther has the effect. According to the multifunctional chair providedwith the frame body structure I 11, the third rotating assembly 8 can beconnected with any one of or a combination of several of the frame bodyportion I 111, the frame body portion II 112, the pivotal structure I113 or the second supporting piece 41, and the second frame body unit 2is rotatably connected relative to the first frame body unit 1, so thatthe multifunctional chair has two using states: the first posture forthe reclining chair or the seat or the second posture for the fitnessequipment.

As shown in FIG. 20-FIG. 21, as an embodiment V of the presentinvention, disclosed is a multifunctional chair. The difference betweenthe embodiment V and the embodiment I lies in that the frame bodystructure I 11 is provided with the pivotal structure I 113 in theembodiment IV; as the rotating angle between the ratchet wheel arm 811and the rotating arm 814 is limited in a certain range, the second framebody unit 2 and the third supporting unit 5 are folded and contractedabove the frame body portion I 111. On the basis of the embodiment I,the integral volume of the multifunctional chair is reduced, and it ismore convenient to store, package, carry or transport.

As shown in FIG. 22-FIG. 23, as an embodiment VI of the presentinvention, disclosed is a multifunctional chair. The difference Ibetween the embodiment VI and the embodiment IV lies in that the firstsupporting piece 31 is arranged as the spilt structure, including thefirst supporting portion 311 and the second supporting portion 312,where the first supporting piece 31 is directly connected with the firstconnecting position 103 on the frame body structure I 11 and is notconnected via the first rotating assembly 6, the second supportingportion 312 is pivotably connected with the first supporting portion311, and the second supporting portion 312 can be rotated relative tothe first supporting portion 311, so that the angle formed between thefirst supporting portion 311 and the second supporting portion 312 ischanged. In the embodiment, when the second supporting portion 312rotates to the lower side of the frame body portion I 111 relative tothe first supporting portion 311 to lean against the frame body portionI, the second supporting portion 312 can further be folded contracted,so that the integral volume of the multifunctional chair is reduced, andit is more convenient to store, package, carry or transport. When thesecond supporting portion 312 rotates to the original state relative tothe first supporting portion 311, the second supporting portion 312 canbe unfolded to use. In the embodiment, the pivotal structure II 313between the first supporting portion 311 and the second supportingportion 312 is a hinge structure which is simple in structure andconvenient to assemble and use. Certainly, in some other embodiments,the pivotal structure II 313 can further be other pivotal connectorscapable of rotatably contracting the second supporting portion 312relative to the first supporting portion 311 and forming the shape andstructure of the original first supporting piece 31 when being unfoldedand used, where the second supporting portion 312 can be switchedbetween the folded and contracted state and the unfolded state. Inaddition, the lower end of the first supporting portion 311 in theembodiment is arranged close to the first connecting position 103, andthe positioning connector 91 is only arranged on the second supportingportion 312, so that the folded and contracted second supporting portion312 is closer to the frame body structure I 11, and therefore, thefolded and contracted multifunctional chair is integrally more compact.Certainly, in some other embodiments, the lower end of the firstsupporting portion 312 can further be arranged slightly far away fromthe first connecting position 103. The positioning connector 91 canfurther be arranged on the first supporting portion 311 and the secondsupporting portion 312 or is only arranged on the first supportingportion 311, so that the second supporting portion 312 is rotatablycontracted relative to the first supporting portion 311 to be switchedbetween the folded and contracted state and the unfolded state. Inaddition, the connecting end between the first supporting portion 311and the second supporting portion 312 is further provided with thepositioning protrusion, and the connecting end of the second supportingportion 312 is correspondingly provided with the positioning groove forpositioning the unfolded second supporting portion 312, so that theconnecting stability is enhanced, and conditions of twisting, deflectingand the like of the first supporting portion 311 or the secondsupporting portion 312 are prevented. The first supporting piece 31 inthe embodiment is made of a wood material, so that the feeling ofcomfort is enhanced. In some other embodiments, the first supportingpiece 31 can further be made of metal materials such as steel and ironor a plastic material or made from other materials or a combination ofthe materials, so that the multifunctional chair is of more diversity.Certainly, the first supporting piece 31 in the embodiment can furtherbe used in other embodiments, so that the multifunctional chairs inother embodiments further have the effect.

As shown in FIG. 22, the difference II between the embodiment VI and theembodiment IV lies in that the first supporting piece 31 is arranged asa structure that is narrow on the upper side and wide on the lower side.The rod structure in the embodiment IV is replaced, so that there is alarger contact area between the lower end surface of the firstsupporting piece 31 and the mounting end surface such as ground, andtherefore, the integral stability and bearing performance of themultifunctional chair are improved. Certainly, the first supportingpiece 31 in the embodiment can further be used in other embodiments, sothat the multifunctional chairs in other embodiments further have theeffect.

As shown in FIG. 22, the difference III between the embodiment VI andthe embodiment IV lies in that the second supporting unit 4 is connectedwith the main body of the first supporting unit 3 close to the tail end102 and the tail end 102, i.e., the second supporting unit 4 integratedwith the frame body structure I 11 in the embodiment IV is replaced bythe independent second supporting unit 4, the second supporting unit 4comprises two second supporting pieces 41 respectively connected withthe main body of the frame body structure I 11 close to the tail end 102and the tail end 102 and a second reinforcing piece 42 arranged betweenthe second supporting pieces 41, and the second supporting pieces 41 arearranged as structures that are narrow on the upper side and wide on thelower side, the rod structure in the embodiment IV is replaced, so thatthere is a larger contact area between the lower end surface of thefirst supporting piece 41 and the mounting end surface such as ground,and therefore, the integral stability and bearing performance of themultifunctional chair are improved. In the embodiment, the secondsupporting piece 41 is connected with the main body of the frame bodystructure I 11 close to the tail end 102 and the tail end 102, so thatthe contact area of the connecting area is increased and the connectingstability is improved. Certainly, in some other embodiments, the secondsupporting piece 41 can further be connected with the tail end 102 ofthe frame body structure I 11 or the position close to the tail end 102independently. The second supporting piece 41 and the frame bodystructure I 11 can be connected via the fixed connection structure suchas welding and riveting structures, so that the connecting stability isimproved. They can further be connected via the detectable connectionstructures such as screws and buckles, so that it is convenient to mountand detach. The second supporting piece 41 in the embodiment is made ofa wood material, so that the feeling of comfort is enhanced. In someother embodiments, the second supporting piece 41 can further be made ofmetal materials such as steel and iron or a plastic material or madefrom other materials or a combination of the materials, so that themultifunctional chair is of more diversity. Certainly, the secondsupporting piece 41 in the embodiment can further be used in otherembodiments, so that the multifunctional chairs in other embodimentsfurther have the effect.

As shown in FIG. 24-FIG. 25, as an embodiment VII of the presentinvention, disclosed is a multifunctional chair. The difference Ibetween the embodiment VII and the embodiment IV lies in that the thirdsupporting unit 5 includes an upper third supporting piece 531 and alower third supporting piece 532, where the upper end of the upper thirdsupporting piece 531 is rotatably connected with the frame bodystructure II 21, the upper end of the lower third supporting piece 532is in fit connection with the upper third supporting piece 531, and thelower end of the lower third supporting piece 532 is separably connectedwith the frame body structure I 11. The upper third supporting piece 531and the lower third supporting piece 532 in the embodiment replace thethird supporting piece 51 and the third adjusting assembly 52 in theembodiment IV. The upper third supporting piece 531 and the lower thirdsupporting piece 532 are matched structurally to support the frame bodystructure II 21 at each angle. In some other embodiments, the lower endof the lower third supporting piece 532 can further be movably connectedwith the frame body structure I 11 via and adjustable structure. Theframe body structure II 21 at each angle is supported jointly by theadjustable structure or the adjustable structure combined with amatching structure of the upper third supporting piece 531 and the lowerthird supporting piece 532. Certainly, in some other embodiments, thelower end of the third supporting piece 532 can further be connectedwith the second supporting unit 4, which also has an equivalent effect.In the embodiment, the upper third supporting piece 531 and the lowerthird supporting piece 532 are arranged as telescopic structures. Whenit is needed to adjust the height of the second frame body unit 2relative to the mounting end surface such as ground or the angle thereofrelative to the first leaning unit 13, a connecting end III 5321 isgradually contracted and hidden in a mounting channel III 5311, i.e.,the height of the second frame body unit 2 relative to a mountingsection such as ground is reduced, and the angle of the second framebody unit 2 relative to the first leaning unit 13 is decreased. When thelower third supporting piece 532 is gradually stretched and unfoldedrelative to the upper third supporting piece 531, i.e., the height ofthe second frame body unit 2 relative to the mounting end surface suchas ground is increased and the angle of the second frame body unit 2relative to the first leaning unit 13 is decreased, so that it is easyto operate and convenient to use. Certainly, in some other embodiments,the upper third supporting piece 531 and the lower third supportingpiece 532 can further be in fit connection by using other adjustablestructures such as a slide rail structure and a buckling structure, andthe frame body structure II 21 at each angle can be supported bychanging the overall lengths of the upper third supporting piece 531 andthe lower third supporting piece 532. Certainly, the upper thirdsupporting piece 531 and the lower third supporting piece 532 in theembodiment are made of metal materials such as steel and iron, so thatthe firmness of the structure is improved. In some other embodiments,the upper third supporting piece 531 and the lower third supportingpiece 532 can be further made of materials such as wood and plastics andother materials or made from a combination of the materials, so that themultifunctional chair is of more diversity. Certainly, the thirdsupporting unit 5 in the embodiment can further be used in otherembodiments, so that the multifunctional chairs in other embodimentsfurther have the effect.

As shown in FIG. 24, the difference II between the embodiment VII andthe embodiment IV lies in that the first supporting piece 31 is arrangedas the split structure, including the first supporting portion 311 andthe second supporting portion 312, where the upper end of the secondsupporting portion 312 is in fit connection with the lower portion ofthe first supporting portion 311, and the lower end surface thereofleans against the mounting end surface of the mounting media of a floor,a ground mat, gravel and various indoor or outdoor platforms, so thatthe overall length of the first supporting portion 311 and the secondsupporting portion 312 is changed, i.e., the height of the firstconnecting position 103 on the frame body structure I 11 relative to themounting end surface such as ground can be changed. The first supportingpiece 31 of the integrated structure in the embodiment IV is replaced bythe first supporting piece 31 of the split structure including the firstsupporting portion 311 and the second supporting portion 312. Bymatching the second supporting portion 312 with the first supportingportion 311 structurally, the first connecting position 103 of the framebody structure I 11 is supported at the first supporting piece 31 and ona basis that the first supporting piece 31 can be folded and contractedbelow the frame body structure I 11 via the first rotating assembly 6relatively, the length of the first supporting piece 31 can further beadjusted to adjust the height of the overall height of themultifunctional chair, so that the multifunctional chair is richer inusing state and a wider application range. In the embodiment, the secondsupporting portion 312 and the first supporting portion 311 are arrangedas telescopic structures. The overall height of the multifunctionalchair can be adjusted by changing the overall length of the secondsupporting portion 312 and the first supporting portion 311, and it iseasy to operate and convenient to use. Certainly, in some otherembodiments, the first supporting portion 311 and the second supportingportion 312 can also be in fit connection by using other adjustablestructures such as a slide rail structure and a buckling structure, andthe overall height of the multifunctional chair can further be adjustedby changing the overall length of the first supporting portion 311 andthe second supporting portion 312. In addition, the lengths of the firstsupporting portion 311 and the second supporting portion 312 in theembodiment are substantially consistent, the two positioning connectors91 are respectively arranged between the two first supporting portions31 and the two second supporting portions 312, so that the overlappedlengths of the contracted first supporting portions 31 and secondsupporting portions 312 are greater, and the sum of the lengths of theunfolded first supporting portions 31 and second supporting portions 312is greater, and therefore, the overall height adjusting range of themultifunctional chair is large by the first supporting piece 31.Meanwhile, the interval between the two positioning connectors 91 isincreased or decreased therewith to place or position parts such as feetand shanks with different intervals. Certainly, in some embodiments, thelengths of the first supporting portion 311 and the second supportingportion 312 can further be arranged at a relatively large interval. Thetwo positioning connectors 91 can further be merely arranged on thefirst supporting portion 311 or the second supporting portion 312, sothat the overall height of the multifunctional chair can be adjusted bychanging the overall lengths of the first supporting portion 311 and thesecond supporting portion 312. Certainly, the first supporting portion311 and the second supporting portion 312 in the embodiment are made ofmetal materials such as steel and iron, so that the firmness of thestructure is improved. In some other embodiments, the first supportingportion 311 and the second supporting portion 312 can be further made ofmaterials such as wood and plastics and other materials or made from acombination of the materials, so that the multifunctional chair is ofmore diversity. Certainly, the first supporting piece 31 in theembodiment can further be used in other embodiments, so that themultifunctional chairs in other embodiments further have the effect.

As shown in FIG. 24, the difference III between the embodiment VII andthe embodiment IV lies in that the second supporting piece 41 isarranged as the split structure, including the third supporting portion411 and the fourth supporting portion 412, where the upper end of thefourth supporting portion 412 is in fit connection with the lowerportion of the third supporting portion 411, and the lower end surfacethereof leans against the mounting end surface of the mounting media ofa floor, a ground mat, gravel and various indoor or outdoor platforms,so that the overall length of the third supporting portion 411 and thefourth supporting portion 412 is changed, i.e., the height of the rearend of the frame body structure I 11 relative to the mounting endsurface such as ground can be changed. The second supporting piece 41 ofthe integrated structure in the embodiment IV is replaced by the secondsupporting piece 41 of the split structure including the thirdsupporting portion 411 and the fourth supporting portion 412. Bymatching the fourth supporting portion 412 with the third supportingportion 411 structurally, on a basis that the second supporting piece 41supports the rear end of the frame body structure I 11, the length ofthe second supporting piece 41 can further be adjusted to adjust theheight of the rear end of the multifunctional chair, so that themultifunctional chair is richer in using state and a wider applicationrange. In the embodiment, the fourth supporting portion 412 and thethird supporting portion 411 are arranged as telescopic structures. Theheight of the rear end of the multifunctional chair can be adjusted bychanging the overall length of the fourth supporting portion 412 and thethird supporting portion 411, and it is easy to operate and convenientto use. Certainly, in some other embodiments, the third supportingportion 411 and the fourth supporting portion 412 can also be in fitconnection by using other adjustable structures such as a slide railstructure and a buckling structure, and the height of the rear end ofthe multifunctional chair can further be adjusted by changing theoverall length of the third supporting portion 411 and the fourthsupporting portion 412. In addition, the second reinforcing pieces 42 inthe embodiment are arranged between the tail ends of the two fourthsupporting portions 412, so that the contact areas between the secondsupporting units 4 and the mounting end surfaces such as ground areincreased, and the stability of placing the chair is improved. Inaddition, the second reinforcing pieces 42 further connect the secondsupporting pieces 41 on two sides integrally, facilitating integralfolding or stretching of the second supporting unit 4 relative to thefirst frame body unit 1. Certainly, in some other embodiments, thesecond reinforcing pieces 42 can further be arranged between otherpositions of the two fourth supporting portions 412 or between the twothird supporting portions 411, so that the structural stability and thebearing performance of the second supporting unit 4 are enhanced.Certainly, the third supporting portion 411 and the fourth supportingportion 412 in the embodiment are made of metal materials such as steeland iron, so that the firmness of the structure is improved. In someother embodiments, the third supporting portion 411 and the fourthsupporting portion 412 can be further made of materials such as wood andplastics and other materials or made from a combination of thematerials, so that the multifunctional chair is of more diversity.Certainly, the second supporting piece 41 in the embodiment can furtherbe used in other embodiments, so that the multifunctional chairs inother embodiments further have the effect.

As shown in FIG. 24, the difference IV between the embodiment VII andthe embodiment IV lies in that the second supporting unit 4 is rotatablyconnected with the first frame body unit 1 via the second rotatingassembly 7. In the embodiment, by additionally arranging the secondrotating assembly 7, the second supporting unit 4 can rotate relative tothe first frame body unit 1. On the one hand, by adjusting the relativeangle between the second supporting unit 4 and the first frame body unit1, the angle between the second supporting unit 4 and the mounting endsurface such as ground and the overall height of the multifunctionalchair are changed, so that the supporting direction of the first framebody unit 1 by the second supporting unit 4 is changed to form differentsupporting structures, and therefore, the multifunctional chair isricher in using state. On the other hand, after the second supportingunit 4 is rotated to lean against the first frame body unit 1, thesecond supporting unit 4 can further be folded, so that more folding andcontracting modes are provided for the multifunctional chair. In theembodiment, there are two second rotating assemblies 7. The secondsupporting piece 41 and the frame body structure I 11 on the same sideare connected via one second rotating assembly 7, and are driven by thesecond reinforcing piece 42 to rotate relative to the frame bodystructure II 11 on the same side, so that it is convenient to fold andcontract the second supporting unit 4 independently.

As shown in FIG. 25, as an embodiment VII of the present invention, thesecond rotating assembly 7 includes a connector II 71, a rotating shaftII 72 and a limiting piece II 73, where one end of the connector II 71is connected with the frame body structure I 11 via the rotating shaftII 72 while the other end thereof is hinged to the second supportingpiece 41 via the other rotating shaft II 72, so that the secondsupporting piece 41 can rotate relative to the connecting position onthe frame body structure I 11. The rotating shaft II 72 is arrangedperpendicular to the direction of the frame body structure I 11, and thelimiting piece II 73 is arranged on the front portion of the connectorII 71, so that the rotating trajectories of the two second supportingpieces 41 are defined in a parallel direction of the frame bodystructure I 11, thereby preventing instability of the multifunctionalchair due to inconsistence of the rotating angles and the directions ofthe two second supporting pieces 41. In the embodiment, when the secondsupporting unit 4 is rotated backwards to the top end of the secondsupporting piece 41 relative to the first frame body unit 1 to leanagainst the limiting piece II 73, i.e., the second supporting unit 4 isunfolded under drive by the second supporting piece 41, at the time, themultifunctional chair can be placed on the mounting end surfaces such asground to use. When the second supporting unit 4 is rotated forwards tothe first frame body unit 1 relative to the first frame body unit 1 tolean against the first frame body unit 1, i.e., the second supportingunit 4 is folded and contracted under drive of the second supportingpiece 41, at the time, the integral volume of the multifunctional chairis reduced and it is convenient to store, package, carry or transport.Certainly, in some other embodiments, a locking piece can further bearranged to lock the second supporting piece 41 at any angle rotatingrelative to the connector II 71, so that second first supporting piece41 and the first frame body unit 1 are integrally fixed to differentangles and positions for support at different angles and positions, andthus, the multifunctional chair is richer in using state. In some otherembodiments, the second rotating assembly 7 can further be arranged asother connecting structures such as a hinge in such a manner that thesecond supporting piece 41 rotates relative to the frame body structureI 11 and the second supporting unit 4 is converted between the unfoldedstate and the contracted state, so that it is convenient to use, store,package, carry or transport. In addition, the pivotal connector I 114 inthe embodiment IV or the pivotal connector II 313 in the embodiment VIcan further be a structure of the second rotating assembly 7 in theembodiment. Certainly, the second rotating unit 7 in the embodiment canfurther be used in other embodiments, so that the multifunctional chairsin other embodiments further have the effect.

What is claimed is:
 1. A multifunctional chair, comprising: a firstframe body unit, the first frame body unit being provided with a headend and a tail end; a first supporting unit configured to support thefirst frame body unit, the first supporting unit being connected with afirst connecting position of the first frame body unit and a height ofthe tail end of the first frame body unit being lower than a height ofthe first connecting position; a first leaning unit arranged in on topof the first frame body unit, and close to the first connectingposition; a second frame body unit arranged on a back portion of thefirst frame body unit, the second frame body unit and the first framebody unit being rotatably connected, the second frame body unit and thefirst frame body unit in rotatable connection being capable of movingbetween a first posture of a reclining chair or a seat and a secondposture of fitness equipment, the second frame body unit and the firstframe body unit being in the first posture when having an angle, and thesecond frame body unit and the first frame body unit being in the secondposture when the tail ends of the second frame body unit and the firstframe body unit are overlapped; and a second leaning unit arranged ontop of the second frame body unit.
 2. The multifunctional chair of claim1, wherein the first frame body unit comprises a frame body structure Iand a transverse supporting structures I arranged in parallel, thetransverse supporting structures I are arranged on top of the frame bodystructure I at an interval, the frame body structure I and thetransverse supporting structures I are configured to mount and supportthe first leaning unit, the frame body structure I and/or the transversesupporting structures I are arranged as a rod-shaped structure, and theframe body structure I is arranged as an upward-convex arc-shapedstructure.
 3. The multifunctional chair of claim 2, wherein the framebody structure I is arranged as an integrated structure.
 4. Themultifunctional chair of claim 2, wherein the frame body structure I isarranged as a split structure, comprising: a frame body portion I; and aframe body portion II pivotably connected with the frame body portion Ivia a pivotal structure I, the pivotal structure I comprising a framebody portion III and at least two pivotal connectors I hinged to twoends of the frame body portion III, the frame body portion I and theframe body portion II being respectively hinged with the pivotalconnectors I and being respectively folded, and contracted relative totwo ends of the frame body portion III to change an angle formed betweenthe frame body portion I and the frame body portion II, therebyunfolding and folding states of the frame body portion I and the framebody portion II being adjusted.
 5. The multifunctional chair of claim 3,wherein the second frame body unit is connected with the first framebody unit via a third rotating assembly, and is configured to adjust afirst posture and/or a second posture in position of the second framebody unit relative to the first frame body unit and/or lock the secondframe body unit in the first posture and/or the second posture, thethird rotating assembly is arranged in a middle position of the firstframe body unit, and the second frame body unit is arranged to bematched with a shape of the tail end of the first frame body unit; thesecond posture is formed in such a way that the second frame body unitmoves along the direction of the tail end of the first frame body unitvia rotation of the third rotating assembly to be overlapped with thetail end of the first frame body unit; and the first posture is formedin such a way that the second frame body unit moves along any onedirection of the head end or the tail end of the first frame body unitvia rotation of the third rotating assembly to have an angle with thefirst frame body unit.
 6. The multifunctional chair of claim 5, whereinthe second frame body unit comprises a frame body structure II andtransverse supporting structures II arranged in parallel, the transversesupporting structures II are arranged on the frame body structure II atan interval, the frame body structure II and the transverse supportingstructures II are configured to mount and support the second leaningunit, the frame body structure II and/or the transverse supportingstructures II are arranged as a rod-shaped structure, and the frame bodystructure II is arranged as an upward-convex arc-shaped structurematched with the tail end of the frame body structure I.
 7. Themultifunctional chair of claim 6, wherein the third rotating assemblycomprises: a ratchet wheel with a ratchet wheel arm, the ratchet wheelarm being connected with the frame body structure II and/or thetransverse supporting structures II; a rotating arm, one end thereofbeing hinged with the ratchet wheel via a ratchet wheel shaft and theother end thereof being connected with the frame body structure I and/orthe transverse supporting structures I; a check pawl hinged with therotating arm via a check pawl shaft and arranged corresponding to theratchet wheel for resisting rotation of the ratchet wheel; a returnpiece sleeved on the ratchet wheel shaft, one end of the return piecebeing provided with an arc-shaped notch structure, the ratchet wheelbeing provided with an arc-shaped protrusion structure corresponding tothe arc-shaped notch, and the other end of the return piece beingprovided with a lug structure corresponding to the check pawl to drivethe check pawl to leave the ratchet wheel; and a restoration piece forrestoring the check pawl.
 8. The multifunctional chair of claim 6,wherein the third rotating assembly comprises: a connector III connectedwith the frame body structure II; and a rotating shaft III, one endthereof being connected with the frame body structure I and the otherend thereof being connected with the connector III.
 9. Themultifunctional chair of claim 8, further comprising a third supportingunit for supporting the second frame body unit, the third supportingunit being arranged on a lower rear side of the second frame body unit,the third supporting unit comprising: a third supporting piece, an upperend of the third supporting piece being rotatably connected with theframe body structure II, the third supporting piece comprising twosupporting pieces III and a clamping piece III, and the upper ends ofthe two supporting pieces III being rotatably connected with the twoframe body structures II via hinging pieces III respectively and thelower ends thereof being connected to positions of the clamping pieceIII close to two end portions, respectively; and At least two thirdadjusting assemblies, the third adjusting assemblies beingcorrespondingly arranged on the two frame body structures I to adjustthe position of the third supporting piece relative to the first framebody unit, each of the third adjusting assemblies comprising anadjusting piece III, the adjusting piece III being provided with severaladjusting channels III, each of the adjusting channels III beingarranged to be matched with the lower end of the third supporting piece,the adjusting channels III being arranged as trough structures opened inthe upper ends, and the clamping piece III between a position where thetwo supporting pieces III and the clamping piece III are connected andtwo end portions of the clamping piece III is connected with the troughstructure in a clamping manner to support and lock the lower end of thethird supporting piece in a certain adjusting channel III.
 10. Themultifunctional chair of claim 2, wherein the first connecting positionis arranged close to the head end of the first frame body unit and/or isarranged overlapped with the head end of the first frame body unit,there is at least one first supporting unit, the first supporting unitis arranged at an angle with a mounting end surface, the upper end ofthe first supporting unit is arranged obliquely backwards, the firstsupporting unit comprises at least two first supporting pieces arrangedin parallel, each of the first supporting pieces is arranged as arod-shaped structure or a structure that is narrower on the upperportion and wider on the lower portion, and the upper end of the firstsupporting piece is connected with the first connecting position of thefirst frame body unit and the lower end of the first supporting pieceleans against the mounting end surface of a mounting medium.
 11. Themultifunctional chair of claim 10, wherein the first supporting piece isarranged as an integrated structure, and the first supporting unit isrotatably connected with the first frame body unit via a first rotatingassembly, the first rotating assembly comprising: a connector Iconnected with the first connecting position on the frame body structureI; a rotating shaft I, one end thereof being hinged with the firstsupporting piece while the other end thereof being connected with theconnector I, the rotating shaft I being arranged perpendicular to adirection of the frame body structure I; and a limiting piece I arrangedon a front portion of the connector I, the first supporting unit beingrotated forwards relative to the first frame body unit to the front endof the first supporting piece to lean against the limiting piece I so asto unfold the first supporting unit, and the first supporting unit beingrotated by the first frame body unit to lean against the first framebody unit so as to fold and contract the first supporting unit.
 12. Themultifunctional chair of claim 10, wherein the first supporting piece isarranged as a split structure, comprising: a first supporting portion, alower end of the first supporting portion being arranged close to thefirst connecting position; and a second supporting portion pivotablyconnected with the first supporting portion, change an angle between thefirst supporting portion and second supporting portion, thereby theunfolding and folding states of the first supporting portion and thesecond support being adjusted, the second supporting portion beingcapable of folding and contracting the second supporting portion whenrotating relative to the first supporting portion to lean against thelower side of the frame body portion I, the second supporting portionbeing capable of unfolding the second supporting portion when rotatingrelative to the second supporting portion to an original state,connecting ends of the first supporting portion and the secondsupporting portion being further provided with positioning protrusions,and the connecting end of the second supporting portion beingcorrespondingly provided with a positioning groove to position theunfolded second supporting portion.
 13. The multifunctional chair ofclaim 2, further comprising a positioning unit arranged on the firstsupporting unit, wherein when the multifunctional chair is in the secondposture, the positioning unit is configured for placing and/orpositioning a foot or a leg of a human body, the positioning unitcomprising: at least two positioning connectors arranged at an interval,the positioning connectors being arranged as rod-shaped structures at aninterval, two ends of the positioning connectors being respectivelyconnected with a first supporting piece; and/or positioning adjustingpieces sleeved on the positioning connectors, the outer ends of the eachof the positioning adjusting pieces being formed with a positioning endsurface for the foot or the leg of the human body to lean against andthe positioning adjusting piece being arranged as a flexible structure.14. The multifunctional chair of claim 2, further comprising a secondsupporting unit, wherein the second supporting unit is connected withthe tail end of the first frame body unit and/or is connected with amain body close to the tail end.
 15. The multifunctional chair of claim2, further comprising a second supporting unit, wherein the secondsupporting unit is composed of the tail end of the first frame body unitand/or a main body of the first frame body unit close to the tail end.16. The multifunctional chair of claim 14, wherein there is at least onesecond supporting unit, the second supporting unit is arranged at anangle with the mounting end surface, the upper end of the secondsupporting unit is arranged obliquely forwards, the second supportingunit comprises at least two second supporting pieces arranged inparallel, each of the second supporting pieces is arranged as arod-shaped structure or a structure that is narrower on the upperportion and wider on the lower portion, the upper end of the firstsupporting piece is connected with the first frame body unit and thelower end of the first supporting piece leans against the mounting endsurface of a mounting medium, the two second supporting pieces arerespectively located on a same plane with the frame body structure I onthe same side, the second supporting unit further comprises at least onesecond reinforcer arranged between the two second supporting pieces, andthe second reinforcer is arranged as a rod-shaped structure to reinforcethe second supporting unit.
 17. The multifunctional chair of claim 2,further comprising a handrail structure, wherein the handrail structureis arranged at the head end of the first frame body unit, and is sleevedoutside the head end of the first frame body unit for holding.
 18. Themultifunctional chair of claim 2, wherein the first leaning unitcomprises a first leaning structure for the human body to sit or liedown, the first leaning structure being formed by extending from aposition close to the first connecting position and/or from the firstconnecting position along the direction of the tail end of the firstframe body unit; and the second leaning unit comprises a second leaningstructure for the human body to sit or lie down, the second leaningstructure being arranged on the second frame body unit and being formedby extending from one end of the second frame body unit along thedirection of the other end along the first frame body unit.
 19. Themultifunctional chair of claim 18, wherein the first leaning structureis connected with the frame body structure I by an end portion thereofand/or by wrapping the frame body structure I fully; and/or the secondleaning structure is connected with the frame body structure II by anend portion thereof and/or by wrapping the frame body structure IIfully; the first leaning structure and/or the second leaning structureare arranged as cloth structures and/or leather structures and/or bamboostructures and/or rattan structures and/or plastic structures and/orwooden structures.
 20. The multifunctional chair of claim 18, whereinthe first leaning structure is connected with the frame body structure Ivia a first connecting assembly, the first connecting assembly beingarranged as a buckling structure and/or a hooking structure and/or apasting structure; and/or the second leaning structure is connected withthe frame body structure II via a second connecting assembly, the secondconnecting assembly being arranged as a buckling structure and/or ahooking structure and/or a pasting structure; and the first leaningstructure and/or the second leaning structure are arranged as clothstructures and/or leather structures and/or bamboo structures and/orrattan structures and/or plastic structures and/or wooden structures.